I encourage the dev team at Daybreak to really put the effort into keeping the integrity of the game intact.
Globally this means addressing the afk, boxing and afk boxing issues. It means handling the add-ons and hackers (even on Zek). It means doing things like massive DoT changes carefully, so that they scale intelligently through all eras being revised, but also finishing something like this when you start it. It does mean continuing to refine and progress the game. It also means banning the clear EULA breakers. It also means fixing server stability and the login patcher. It means improving official communication about what is going on. Getting a message out is easier than 1999 after all.
For live servers, it means not letting fixes and/or progression server adjustments break things. A recent good example is the "locked door bug". Yes it was a good fix. But it needs to be further fixed so live server players can access the old content without boxing a heroic rogue (or leveling one just to open a door). Simple fix is making lockpicking an all class AA era-set ahead of PoP but before current. It also means finishing unfinished things and fixing bugs. It means continuing to develop the game in a fun playable way. For example, hopefully it means EoK 2 with more of the zones (like Old Sebilis) available.
For progression servers, it means not catering to players that miss the point of progressing through eras (or enabling cheaters). A list is faster:
-continue to remove, reassign and set eras for things so they fit (aka rogue poisons and a DoN task in LoY are two recent blunders)
-not selling items (mounts) before mounts are supposed to be in game... with buffs that are massively overpowered for the era
-removing things completely that were mistakes/exploits. "Claimsgate" is an example of this being unclearly done, and the already mentioned rogue poisons.
-for Phinny specifically, it means not creating server drama points by not instancing something (i.e., Plane of Storms keying) on a server that open world wasn't supposed to be a barrier to raiding
Note: the recent decision to release GoD/OoW separately on progression was a pro-integrity move. Combining different level cap expacs is not a good idea. Combining some same-level cap ones is fine (PoP + LoY works for example).
I didn't mention Krono because I doubt we'll ever see a "no krono" server.