i generally agree 5e succeeded surprisingly well for low rule content, slow splat release, and high prices.
some of the concept material was playable too. though concentration i think did more harm than good. if i didn't have so much dislike of tactical 4e, i would rate 5e as the worst of the bunch because of stuff like concentration and schizophrenic interclass/action economy limits.
Attempting to balance in the south west of the garden while the imps are madcap on the north lawn is scarcely tolerable. For every Nerf i found in 5e i found some OP exploit a few pages later that dwarfed it. Case in Point, Frosty Clones.