I disagree. I can say that one of the things I hated most about 3E was the profusion of fiddly little modifiers for this and that and the other thing. Adjusting your character's stats on the fly is one of the things I was very happy to see gone (mostly) in 4E.
What I would like to see from Wildshape is simple: A statblock for each animal you can turn into. Anything in that statblock overrides your own stats. It might have to be finessed a little (do you lose your knowledge of Arcana because you turn into a hawk?), but that's the general direction.
I'm gonna repeat it, I don't think we have the information to say that for that assessment. We don't know if 5E will have fiddly bits for spotting things. We don't know if it will have the Spot skill. We don't know if it will have any skills! It might be that a +3 bonus would work great because there are damn few skill bonuses in 5E. Who knows?
I don't want a statblock for each animal. If we can do it with offering choice, then that is the way to go. If every druid turns into the same eagle, that's a little dull. It also makes assumptions about my game world that requires more work if I'm running something more exotic. If I have a Pleistocene-era style game I can easily work the prehistoric animals into a choose-3 setting. If the statblocks are pre-assigned I have to look at the druid player and tell him that 9 of 10 of these don't exist.