This kind of goes to my question about voting on features and how developer "resources" will be allocated
A lot of votes may be for eye candy when stuff like Delurin's Real data type mod could be far more important.
IMHO the "most important"
things for mmo development are already done. The game systems.
I have few complaints about Multiverse.
Physics is important but for example, a "next gen" mmo with minimum req's that exceed
my cards didn't even ship with jumping!
FFXIV. Yes, they may be adding it.
My favorite game FFXI never had it and for me it has zero impact on gameplay or immersion.
The lighting model upgrade may not even be important if you are going for the "cartoony" WoW look.
So it's a matter of opinion, of course, I just hope someone with the 10,000 ft view makes the final decisions
on the roadmap.