I'm sure that someone's already gone over the whole "Kraft cutting AB has now cost the team..." portion of this, so I'll pass on that for the moment...
I like that the team has addressed an obvious positional need. I'd, personally, have preferred either a Patriots-style slot or outside speed, but I'm sure that McDaniels will enjoy finding ways to work in all the WR parts, and Sanu will add to the overall level of play. When you add Sanu in the mix, along with Watson, things seem to be much more settled. The team might still look to add another TE, if they don't think Thomlinson is a long term solution, and the team needs to find an RB1 who's playing like an RB1, but Wynn should solve a lot of the OL problems.
So, adding Watson, Sanu, and Wynn should stabilize the offense at all "levels" except RB, and (barring more injuries) RB1 seems as if it's going to be the final question moving forward.