Parmandur
Book-Friend, he/him
I mean, WotC did just that in the D&D Next process, went over every prior edition woth a fine tooth comb.Reading this makes me feel far too old, given my current campaign started about 4 months before 4e was released.
Thing is, in order to see what might be changed in current 5e to make it more palatable we first need to look at the prior editions - all of 'em - to see what made them unpalatable and thus avoid blundering back into those same errors. At the same time, looking at all the prior editions might yield some good ideas, since lost, that are worth reviving.