Well the Scythe would be a mash of sword and staff, just put a hole in the top of the staff put the sword in it, and bam you have a Scythe weapon
Anyways while I still feel the restrictions there I think the idea has merit and that it could work, I would say slack off some on the restrictions but not to much cause then we will be in the same problem.
But they are not introducing any new jobs to the game, while they want to change the names of the jobs as they stand now they are not adding any new ones. So a Gladiator might just be going Warrior and THM or Conj to White or Black. So even though your idea is good Kuroki they are not adding any classes so it would not work as you foresee.
And for Sorel take a look at the GDC GW2 video its about 30 minutes long. Reason I bring this up for those that are wondering they show how the various classes work together, like a Ranger shooting through a wall of fire from one of the other classes, the arrow gets the fire effect as it goes through the wall of fire. This is something more akin to what I was expecting from XIV if it was anything like they showed in the intro movie.