You have stated yourself that your motive: you want better pacing - think about it. What does it mean?
Yea, MORE exp.

Especially with the ridiculous rate you gave 1 venture/leve - you know how much GC seals you get for a i100 dungeon drop? for a GC crafting/gathering daily turn in? a i55 green item that you can craft/buy and spam?
This literally enables you to power level everything within a short time because the vast amount of exp these leves give - hence is why you are limited in them.

Look at some of the crafting leves, turning in an HQ item pretty much gives you a whole level at low level, and higher level ones (e.i lv45 that reward 100k exp) it only takes HQ 3 to gain a level. 3 crafts to gain a level - leveling a craft while barely doing the craft (or you can just buy it off MB then you wouldn't have to craft at all). But no, that's not enough, you want to be able to do this indefinitely and not be limited by the guild leve allowance.

Yea, there are many ways to get from point A to point B, but you don't need a private jet to do so.
The current method is already a quick and easy route, I guess I can include this into the "Please stop asking SE to make FFXIV more easy!" thread.