I don't know why you keep saying this is some smart move. GMS all around the league make moves like this all the time, and a lot end up being bad decisions.
Grier is leveraging future money for now. Which can be a great move if it leads to at minimum an appearance in AFC champ. Grier leveraged future assets to go out and overpay to get guys like Chubb which has turned into a absolutely shittastic move. Good GMs don't make moves like that Chubb deal unless he is viewed as a missing piece for a long run, we weren't their yet, Grier ****ed the rebuild.
What Grier is doing now carries a lot of risk. He is yet again leveraging future assets (money) for immediate help. In my opinion that extra space for this year won't help enough to fill the massive holes Grier has already created. He is trying to dig himself out of a hole he created.
And again in my opinion, Grier absolutely should have been fired (was never qualified for the job to start with) and the new GM probably would just take some lumps now to shed guys like TA off the roster and take the cap hit right away to try and do a 1/2 year flip of the roster.
The most likely scenario is Grier spends that future money now, we still don't make the playoffs or bounced in the 1st and we are worse of on 26 cap space. And if that happens then what Grier is doing with TA deal was a crap move.