honestly there is no real way to solve the issues cause no matter what they do there is always complaints always uproar thats why they stopped doing job change updates in live letters an in media tour cause people will always get angry at them an as far as job identity they just need to really focus in on what they want that job to do an not fuss over balances or timing windows or casts just let people f*** around an find out how things work, things do not need to work perfectly they just need to have synergy and be fun to play.
as for encounter design i agree this needs to change its boring to all hells dancing around in a box or circle the whole entire fight i want to see them bring in more unique scenario's an have these places have more depth to them. not just be an fancy game of tag
overworld stuff is little tougher to say i dont know what else they could possibly do, you have mobs to wail on for materials, you have elite hunt marks which can be challenged alone or with a party, the fates can feel repetitive but i think the only way to make it less boring is to mix up how the events operate i remember in some older areas there were chain events that would sometimes happen they could bring that idea back for example, an then we have world boss fates such as ixion which require an alliance of players to bring down an award tokens for unique rewards etc. only thing i can think of would be open map duels but people seem so adamant to even that cause they feel like it would lead to harassment but that wouldnt be the case if it opt in meaning two people have to agree to duel to trigger the battle status effect etc.