You definitely have a point with RB. I just don't rate RB that highly. As our success with Ahmed lately shows ... we can find success even with guys basically off the street, so it's just not a high value position these days. That would be different if we're talking about Etienne, who is a Zeke Emanuel/Saquon Barkley level talent. Still, I'm just not a big believer that the position merits a particularly high draft pick these days.
I see WR differently than you do though. Parker is good, Williams is solid, Grant has shown flashes of being solid himself. If we needed WR's, we have Albert Wilson and what's-his-name who took a break this season from Coronavirus fears, and those guys are ours if we want them. Personally, neither would play for me again, but who knows what our front office thinks. WR's are good coming out of college these days, and there's a lot of talent available (Jamarr Chase being particularly tempting with the Texans pick), so we could definitely get some talent there. I just have more faith in the guys we have I guess. I would like a new #1 to pair with Tua, then if Parker/Williams is out injured, we don't miss a beat.
Center I think we need to acknowledge the elephant in the room. Pre-Karras our OL SUCKED. But with Ted Karras calling the shots, everyone we plug into the OL looks competent ... which has not happened in decades. While I give the biggest credit for that to the OL Coach, I definitely would pay Karras and keep this organization together because our track record with OL is terrible. Also, Karras (knock on wood) has so far proven durable. Remember, in the pre-season we heard a lot of chatter that Karras was a one-year rental and we were ready to put the kid from Wisconsin in at center to replace him by 2021 ... possibly sooner.
As for the LB/DE, I definitely see that as a major need, because those hybrid edge players are the cornerstone of this multiple front defense. Essentially, this defense transfers the concept of a linebacker--who represents the ultimate in flexibility--to all front 6 players. Today's NFL uses the nickel as its base defense really, and despite terminology, it is incorrect to think of the DL and LB groups collectively as a "Front Seven" because there's usually only 6 guys there. So, the concepts of a 34 and 43 are outdated and functionally outmoded. Today you hear more about people playing "2-gap" or "3-technique" depending upon where the DL's role or where they line up. Our defense absolutely wants the Randy Starks guys who can play DT and be a penetrating lineman and also line up as a pass rusher even in the interior of the DL. These guys are often big guys like Ndamukong Suh who can also occupy two blockers when needed while also becoming a pure gap-penetrating monster against the run and in the pass rush. This all means our LB's need to be tremendous hybrids.
On the edge those LB's need to be able to flex into true DE positions and threaten the pass rush with speed. They need to line up as LB's and run stunts and delayed blitzes to throw off passing options when the QB tries to step up into the pocket. This leads to many mobile QB's flowing outside of the pocket, because they pocket may become a trap (
Admiral Ackbar - "Its a trap!"). Those are essentially the 34 edge liinebackers updated for a 6 man front, but with even more versatility for today's matchup league. The old school run stuffer LB's are going out of style, rapidly replaced by the hybrid SS/LB guy who can be a thumper in the run game despite being lighter, but still with the speed to cover speedy slot receivers and running backs. Sure, they may get overmatched vs. big TE's, but it is an impossible ask of the LB to be good at everything ... because the offense can always find a weakness to exploit there. So yeah, we keep working to develop guys like Jerome Baker. We hope his speed means he can become one of those LB's ... and he is improving. But ... Bake has a long way to go in terms of run defense and reading offenses, so let's keep our fingers crossed. Surely we will be considering a stud linebacker like Micah Parsons to fill that role instead. But ... is the position really worth that high of a draft pick? Maybe not.
The Van Noy role has not gotten the stats here, but since he came in our defense has been a LOT better. That is no coincidence. Sure, Ogbah's pass rush helped a lot. Sure, Howard's INT's are game changers. And getting guys like Van Ginkel (fumble recovery TD, blocked punt) more experience and reps has helped. But at the end of the day, it has been Van Noy who has enabled these guys to shine. Whether it is Van Ginkel or a new draft pick (like UVA's Charles Snowden, my super sleeper) remains to be seen. But, we'll be looking to improve our LB corps. Agreed.
Your comment about the WR injury status needs to be applied to the DB position as well, IMHO. We get our CB's and S's dinged up a lot around here, and depth is necessary. Coach Flo's system simply can never have enough coverage CB's, and tends to prefer running 3 safeties who are good at coverage. So yeah, with Rowe and McCain getting older, Howard and Jones having injury concerns .... we need a LOT of DB's. Even if/when Iggy develops (and he sucks so far honestly, so it is not guaranteed to happen), he is only one guy. We can't even run 3 safeties now because Brandon Jones is needed to fill in for Rowe and McCain if they get injured ... and he already plays a lot of snaps just to rest those guys.
So all in all, our draft needs are still rather extensive, and yes, there's a lot of need on the defensive side. But this is the NFL ... every team has holes.