There is only one true need and that is a solid back-up QB. Other than that maybe a veteran interior Offensive Lineman and maybe some extra depth in the Linebacker pool.
Center will be alright with Jeanpierre, Lewis and Sokoli. WR also is just right. Baldwin and Kearse are solid starters, Lockett covers the slot position and if Matthews could carry on his SB form that would be a big asset. When Richardson returns the WR group is deep enough. The last thing we need now is a player who will only marginally make us better at one of the highest paid positions, we can't have that now with Bennett and Wilson both wanting more cash.