Actually her buffs made her lane more effectively. The only buff I'd probably remove atleast is the mana cost on Q and range increase of slow on E ( which they only increased for those with higher ping if I am correct)
The secondary buffs like full snare on Q on secondary target (I wouldn't mind if this were removed aswell), midflight activation (gragas got this too), and immediate shield aplication are quite "healthy" buffs.
Lux, compared to other "control"/ "burst" mages is still weaker what they can do compared to her. She still needs 3 items if not more to clear a whole minion wave. It's ridicilous that she can't kill caster minions with one full maxed E. cough cough Viktor, Velkoz, Ziggs, Anivia, Azir, Xerath.
I agree she was always strong, the reason why her winrate went up is also because more people picked her up aswell. 56 % doesn't mean a champion is unbalanced, some are balanced at 48%, some at 50% and some at 55%.
I don't mind the nerfs but I really want to see what balance team will do, cause sometimes their choices are well questionable.