Thank goodness, they need to get back to basics like they did for the first 4 gens. Gen5 started this trend of op abilities, base 10000 attack etc, gen 6 stacked ontop of that with insane megas, then gen 7 introduced zmoves. When a game starts to rely on op mechanics which influence the metagame and team match ups in an inherently negative manner by stacking with previous gens ridiculous mechanics, it and said other mechanics needs to be dropped. There becomes a point because of all these crazy op mechanics it just becomes stupidly convoluted and needless because we essentially only have 6 slots to deal with everything and its not fun.
Keep things simple and relatively balanced, please. Megas werent inherently a bad idea on stuff that sucks like Farfetch'd, Butterfree or stuff begging for an evo but on stuff that is already hard to deal with, thats where it gets stupid.