While I still can't explain few things. one thing that can be assume is that their was nuances we had to learn about PBE netcode. We only just recently learned that some time people couldn't join rooms if match is already going on. While Netcode hasn't really improve delay wise. it does seem more stages are stable to play. Originality the rule of thump was stick to playing Mikoto, Mei, and Itsuki stages and avoid stages with large effects. Now more stages are bearable to play like like infinity and Fin's stages (still should avoid them though).
We still had that one hiccup at the beginning but then everything else seem stable so PBE netcode still ass far as i am concern, though this is reason i would like to push localize release. I'm confident if we get that than we expect further patches to improve netcode. Like examu did for aquapazza.