Its a gamble, you don't have a lot of wiggle room. Your basically going on faith that LT will be productive still. If you base it on that, I think you have to do this. It makes you quite a bit stronger at WR in theory but AJ sees double teams a lot, but he'll still get the ball. I think I'd do it, yeah, take the deal.
I would do it. Through week 4 AJ is the most dynamic player on the table here, and you are getting him, so I like this deal for you. I don't think LT is going to resemble anything like the player he was 2 years ago, but Turner's performance seems to have fallen off the table as well, so it's not like it kills you. Turner also plays one of the toughest run schedules in the league, so chances of him blowing up huge consistently from here on out are low.