I play SMN the most as of Endwalker (had played it up until Shadowbringers, since I very much had zero interest in having carpal tunnel syndrome + GNB was cool), and I can say that I don't like the current mobility it has. SMN was always somewhat mobile, and that was fine. The issue is that right now it's virtually no different than a ranged physical DPS.

I also dislike how inconsistent it is. You go from phases with normal GCD timers, to a phase where you channel your inner Machinist to yet another phase where all your mobility dies and you're stuck with the world's most inconvenient gap closer.

I've always liked that SMN had a bit of challenge to play and had some mobility windows. but not all the time. And I preferred it when my lack of mobility was still something I could handle (like with slidecasting) than being forced to use a gap closer that comes up at the worst possible times. I don't know if this has any impact in balance. But if it does, then it's actively harming it from what I can see. I get streamlining it and making it a pick-up-and-play job. But so too was Red Mage for quite a long while, yet it still wasn't this bad.