Not even by a whole lot. It's just a little confusing why the Dev team spends so much time creating so many side quests for us to enjoy - and then seems to actively go out of the way to de-incentivize players from using them for leveling purposes. I just think it wouldn't harm anything to allow players another avenue for efficient leveling for a single side-job.

It wouldn't harm queue times, if anything it would help DPS jobs that can do the side quests faster than some of their queue times - because Side Quests are finite and non-repeatable, so players would only be able to utilize them for one extra class and then any others after that would need to rely on the usual methods.

Even just a 50% experience boost to doing side quests - make it built into the Armory Bonus - would go a long way to allowing players to play the main story with one class; then come back and tackle all the side quests left behind with an alt job and level it efficiently and effectively.

As it stands, a single level 80 FATE can give roughly 200-300k experience in Endwalker while the equivalent level 80 side quest is only roughly 164k experience - which equates to being a whopping 30+ side quests to go a single level.

With a 50% Armory Boost to side quest xp - I think players could experience the side quests without feeling like they're wasting their time getting paltry exp rewards; be able to get an extra job role leveled up; and it wouldn't feel as if the Devs are wasting their time making all these side quests that the majority of players most likely just ignore if they don't reward gear they need.