Leveling your starting class later?

[Sylve]

I was mainly hoping someone who has actually done this before.

With the roulettes and how good Dungeon EXP is, leveling any Class/Job without the MSQ is easy, if a bit time consuming compared to the MSQ. Just remember Food buffs and the Heat of Battle FC Action if you have access to it. Dont forget to get your Rested EXP up as well.
Use your daily allotment of Leves too, Hunt log etc.

Its really quite easy to level without the MSQ.

Way back when ARR launched, I jumped onto the ACN hypetrain and got that to Summoner before figuring i didn't really care for it as much as i thought i would, jumped back to PGL (I started PGL during Beta) and burned back to the level 32 MSQs i was up to in a couple of days, and that was before all the changes to lower level EXP gains.