I'm playing the game on Switch (almost finished actually, I've reached last dungeon...) and I could check the patch today.
The lag is indeed mostly fixed and autobattle is also much faster now.
About demon fusion skill selection: there is still random selection by default but now you can press a button to choose yourself the skills, it is fully optional.
The lag is indeed mostly fixed and autobattle is also much faster now.
About demon fusion skill selection: there is still random selection by default but now you can press a button to choose yourself the skills, it is fully optional.