-combat from 1.23 has been re-implemented into the game with added features
-all classes and jobs have been renovated due to this re-implimentation
-quality of animation has been made to be better, if not, as good as the quality that appeared in 1.23
-server lag has been virtually reduced to 0 (meaning if you see yourself out of something like plumes on your screen, you're safe)
-animation lock as been re-introduced now that server lag is 0.
-legacy players get re-imbursed 900 philosophy stones for turned in hamlet seals + 300 philosophy stones per relic weapon completed in 1.23.
-legacy gambler's crown renamed to "Gambler's Crown (Legacy)"
-allagan gear re-made into ilvl 95 or ilvl 100 and with increased stats accordingly.
-auto-sort has been added (alphabetical, repair %, etc.)
-option for text instead of icons for inventory/armory/retainer management has been implemented.
-greased lightning and twin snakes increased duration to 20 seconds.

not sure what else...