Currently, I'm not sure if we need the source code to change/add this, or if it takes Jordan a long time to do it. I'll clarify this later.
We have a Status Assistant that allows us to earn some space in our skill bars, anything that is Luna Rock, Stone, or Meteor and the mount and some potions you can use the Status Assistant.
PS : At this level of the game, compared to the Awaken server, we have much less potions or items that we use, I find that the 3 skill bars are enough.
It's always been this way, if someone tries to steal your run room, you just have to report it. With proof (preferably video). We still have time before those areas arrive though.
Adding them as stats in the character's stats is unfortunately not possible. But I can't give you the G-Heal numbers that 1 WIS gives, I don't remember. On the other hand the G-Heal is very important.
I think it's possible, Or add other PvP instances if we have requests for more PvP activity. like Elysian Island or even later Deserted Island Survival.
In general, I agree with your idea 1 and 5! Thank you for your suggestions, and I hope I was able to help you with my few words.