While XY did ultimately run dry with Team Rocket HARD, I appreciate they did have a few really good schemes and face-offs with them early on. SM was weird in that in spite of focusing on Team Rocket more methodically and giving them trump cards like Mimikyu, they actually never really felt like a real challenge for even the non-battler twerps. Every time they were putting up a good fight you knew something like Bewear or a DEM boost would interrupt, otherwise the best they got was a handful of times they landed maybe one hit before they were thrashed. They didn't even try using their Z Moves most of the time. It felt like a waste, especially since a few 'not so harmless' TR battles could have made up for the series' lack of official matches.
Early XY did at least have some genuinely good even handed battles where Team Rocket were competent but the twerps still fought them off (eg. blinded Pikachu and Bunnelby vs Inkay and Wobbuffet, the Pokeball factory Pikachu vs Meowth showdown). Even some of the more comical TR schemes like them dressing up as the twerps felt like they took more advantage of humour and dynamics than most of SM. SM TR never wore down as bad as they did in XYZ though, they just sucked by then.
Hell Matsui wrote the Ralts battle in AG, a series where TR were really lethargic otherwise, why did we never get anything like that again?