>>49542741Aesthetically it's by far the worst of the three, the red glow looks horrid on a lot of mons and those clouds swirling overhead look like turds.
Mechanically it's hands down the healthiest, at least in Doubles, which is the format I play the most. It's a bit centralizing about a few Pokemon that can both abuse and counter it well, but it does so to a far, far smaller extent than Megas literally forcing the format to revolve around a select few each season.
For example, 2014 and beyond, you barely saw any megas bar Rayquaza, Kangaskhan, and Salamence making it to top bracket, with the occasional Mawile seeding somewhere below thrown in. In the Player's Cups that were held last year alone we saw Dynamax options in a range from Charizard, Venusaur, Coalossal, G-Moltres, Regigigas (paired with Weezing), Regieleki, Urshifu, etc. all making top cuts.
Regarding Z-Moves, I feel like I don't have much of an opinion on them. Outside of a few cool interactions with status moves they were a one and done deal, and outside of being slightly annoyed by getting your supposed check hammered by a massively boosted coverage move, I don't think I ever found them too interesting or offensive. Their biggest limiting factor is being a one-shot deal that could be heavily neutered by protect cutting it damage down to 1/4th, which is everywhere in doubles, so you were basically playing mindgames the entire set with open teamsheet tournies, jockeying for position in a way that makes it anything more than a wasted item slot. That sounds pretty interesting on paper, and I'm sure a lot of people enjoyed it, but I guess it wasn't for me
All in all, given Dynamax is almost certainly not coming back next gen, if they don't do a heavy rebalance of Megas and find a way to give Z-Moves something to set them apart, I don't want them back either. Let's go gimmickless for the time being so GF can learn how to balance worth a damn