There were a lot of good improvements with the release of Sigma, as well as patches leading up to it. But there are a few that (to me) overshadow these new features/changes that make the game much less enjoyable to play.
For instance, the current state of run/walk is a disaster. I'm sure new players won't know any better but it really is shit. Having to hold a button for a few seconds of running, followed by a much longer cooldown period (compared to the run duration) isn't an improvement, nor is it fixing anything because run wasn't broken. The old way made more sense. Increased movement at the cost of zero defense and heavily reduced block was a trade off and for some builds or specific situations, it was worth it. Increasing base movement speed and removing the run feature and stamina orb would be better than what exists now. Or just revert to the old way.
Gating ubers behind level requirements. This is probably the worst thing to happen to this game, ever. I won't dive to deep into this but my main problem is that I can't wrap my head around making more than 1 character a season. There are a lot of interesting sus (like the orange text ones) and theory crafting a build while staring at a newly found item is fun but then reality sets in and the thought of leveling a new class to 120+ is god awful. The current season is mostly exempt from this as there were ways of farming xp relatively quickly. With the new one it will be much more apparent. Ideally I'd like to level 2 or maybe 3 different classes in a season, try out some new items, and fail horribly at making something build-worthy. In previous median patches that was enjoyable because a new toon could be rolled in a less than a day, playing solo, doing self-tcows, etc. I think each season there is satisfaction of doing each uber the first time but having to go through the same xp grind for every character in Sigma is a time-sink and the feeling of accomplishment is gone the second time around. Rolling a new class is just too time consuming now. For myself, this means sticking with classes that I know, which means I'm much less likely to try something new in the future. The whole xp rework and uber level requirement feels like a shit attempt at getting people to play longer. I'd much rather play several classes over 6 - 8 weeks, than just one for a few weeks before waving the white flag.
I do appreciate that the multiplayer xp bonuses are being adjusted, as I prefer playing p1 while on realm and am more interested in what a build is capable of at the standard difficulty. Now I won't feel as torn between playing p1 vs spending time finding multiplayer games. Its a step in the right direction but the game was much more enjoyable before.