The quest xp is fine for the amount of xp it takes to lvl. If anything dungeons and PotD give disproportionately more than they should, but that comes from people wanting faster and faster methods of leveling. I wouldn't mind them adjusting quest xp, as long as they smoothed PotD/dungeons and the overall xp to level up as well so that they were all balanced against each other. In my experience, the MSQ and the specific dungeons it requires you to complete are enough to level one job to the cap without any side quests/PotD grinding. Sidequests I left for my alt jobs; usually I did them between dps dungeon queues.
Yeah, I'm gonna stop you right there. I've more gil than I need even after buying a home (the biggest gil-sink in game) for myself, one for my husband, and one for our FC. I've never once bought gold in any MMO, let alone FF14. Gil sellers are a blip on the larger issue of the messed-up economy in the game. We need more gil sinks; mounts, pets, any sort of cosmetic item they can throw at us (and honestly a lot of the cash shop items should be sold for in-game currency to siphon off some of the excess, but that's another discussion on it's own.) Regardless, throwing more gil at players will only exacerbate the problem, certainly not fix it.
This one is probably my second biggest gripe with the game, after the spaghetti code and its related issues.
I've never played on the JP servers or visited their forum, so I can't really say if it is actually better there or that is just an accusation that has been repeated so often it's been accepted as fact. Either way, I have felt on multiple occasions that there is a communication barrier between the playerbase and the devs/mods, and that it has been put in place and maintained by SE's own doing. It really feels like we have been blithely ignored and in some extreme cases actively silenced.