Bring FFXI to PSP Vista. It would bring more players into the game to support it.
Next step would be to uncap all the CoP,RoZ and what fights in the game where a lv90+ job could enter and solo them. This would make the games easyer but at this point in time... that content is very old and very hard to even complete.
FFXIV missions are solo based. Its not good for the game but it also has its benfits. FFXI should do this for FFXI,RoZ,CoP,ToAU and all 3 Mini Packs Storylines. This would attract new casual players to the game.
Also Boost the final reward for Wings of the Goddess by increassing completion of all 3 storylines. More players would plan on beating all of the content then. WotG is far by the longest storyline in the game which takes alot of groups.
Keep Abyssea the way it is.
Make Void (New Endgame) More like Endgame focus on upgrading older equipment based on finding new (very hard) Magician Trial items. Also include new Void gear and make a Combin system when having 2-3 fully completed pieces of equipment.
New Void Body for THF
Skadi Body
Thief EMP AF+2
Combin those 3 pieces =
((New lv99 Equipment))
Lv99 Thief
Acc+40
Haste+8%
Dex+40
Rang acc+30
AGI+35
Evade a Attack= 3TP
Set: Occ tripples the effect of Sneak Attack & Tripple Attack
Treasure Hunter+1
See this way you gotta complete 3 types of endgame to earn equipment
Salvage,Void,Abyssea
You could also apply this to Limbus & Einherjar and other endgame.