Your request is pointless.
1) I am really glad that this game ISNT a wow clone and I know that a lot of other people feel that way too.
2) There's this thing called armoury bonus that gives your alt jobs an exp boost.
3) in the case of your main job, you will have to do MSQ anyways and that gives you a tonne of experience regardless. Especially if you do your daily roulettes with the MSQ
4) if you want to skip the msq jump pots are a thing.
5) After numerous complaints about the length of ARR the Devs are going to revamp the MSQ next patch.
Everything your asking for already exists/ will exist in game. Just because you can't level your main job to max level in a day or two doesn't mean that there aren't tools to speed up the process.
Really friggin tired of people asking for WOW features in a game that (thank goodness) isn't WOW.
Source: I have everything to 80 except BTN and FSH. Also leveled an alt character to max.