>>50075009I'd say it actually doesn't do either idea as well in practice, so it only a combination in that it kinda half-asses both.
>Z-Move Boosting.The whole idea is to set-up FAST and unexpectedly in a single turn like with Z-Conversion, Max-Moves "only" boosts a single stage a turn, so it comparatively takes longer, even though you are blasting high-powered moves at the same time, they also don't really rely on moves having a "twist" to them that shakes up the opponent.
>Z-Move Wall BreakingMax Moves cap out a at 150, compared to 200+ for Z-moves, and while you do get 3 turns of it, the whole idea of Attack Z-Moves is to get a guaranteed oneshot rather then drawing stuff out
>Mega Evolution.D/G-Max Only gets you extra HP, No extra stats and abilities aside from the Max-wide immunites.
Now it is probably better when all factors is combined, but for each gimmick individually the factors are worse.