Fields of Valor should have more field support options! It has so few, it's been a long time since they made these. One I can think of, is a "double exp reward" option, that doubles the final exp reward you get from a hunt, if you finish the hunt while under the effect. (lasts as long as refresh/regen FoV effects)
To make it fair, it could cost 500 tabs.
Red Mage should have the following spells in the next un-cap: True-Sneak, True-Invisible, Reflect.
Possibly Reflect could just be a WHM spell instead though.
True-sneak and invisible would allow you to sneak past enemies that have true-sight or true-hearing, and Reflect would allow you to of course reflect one spell. Reflect should have an instant cast time, but have a five minute recast time, so it should only be used if you see an enemy charging up a really nasty spell. The proposed level 99 merit system could possibly allow you to reduce the recast time of reflect.
Ranger should have a move called curious noise, which causes an enemy to look or slowly walk in the opposite direction of the player that used the ability. This could help you get back shots or help Thief get sneak attack in. Or it could even just be used to sneak past enemies that would otherwise see you. 1 min recast time.
Beastmaster should have an ability called lure, which can, at a high rate of success, lure one enemy and not create aggro by the enemy or surrounding enemies. Once the enemy gets close enough then you could use charm or attack it or whatever you intended to lure it for. Could use the skill while under the effect of invisible and/or sneak.
PuppetMaster should get a set of "Reactive" frames. Stats and features could be similar to the ones out now, but the puppets would be geared more towards doing skillchains or magic bursts with you. Weapon skills and magic burst types could be chosen with the different element maneuvers. Actually this could be done with frame attachments, but I would like to see some different looking frames finally. :-P
Maybe they could make attachments that change actual appearance??
Besieged, it should happen more frequently. If those beastmen really want that Astral Candescence, then they would be all over Al Zahbi. Maybe one set should start their training if there are over 1,000 people online at once, and limit the time in which no faction is training, to 2 hours.