I don't know if this applies to Wallace but a great line for some of the faster WRs is "if he's even, he's leavin'." Maybe Tannehill is waiting that split second to make sure he's wide open before pulling the trigger screwing up the timing, whereas he should just throw it if he's sees them running side by side. Throw him open.
Maybe we'd even get a few PIs out of the deal. Its amazing Wallace only has one PI called against him and maybe no holding penalties with as open as he gets. The one PI was probably the best throw Tannehill made to him but the DB tackled him, it came in OT during the Bengals game. That was the one time the throw was perfect. Would Wallace have made the catch? Who knows. Brutal they got robbed of it though, that might have kept a lot of people off their backs, for a while at least.