Really liking the sound of this update, and interested in your SunPot changes. However, I think more should be done in terms of instant potions. Perhaps even something along the lines of an "In PvP" "Out PvP" mode, where you don't come out of PvP mode until you're not hit for 5 or 10 seconds. This way you could experiment with SunPot / Gin cooldowns in PvP, but have them smashable in PvE (or if you are able to jump out of combat, heal up and get back in - careful making Sins too OP as if they aren't already though with this). That way, it will still be well worth for people to buy inventory expansions.
Also really looking forward to the new cave, be interesting to have XP on hit in Mir. However, I really, REALLY hope this new cave isn't a private server cave like the level 1-20 cave which you can only teleport to with the NPC. That really just feels so ****ing tacky. Please man, make an entrance to it like RedCave or Yims you know, hell even use an existing entrance in the game for it or replace a disused map with it or something.
Private servery telecaves just make me really cringe, not sure why. Guess it reminds me of them crappy Chinese Mirs where you just tele to the KR instantly.