Is it ok with you to camp spawns, like we see in other MMORPGs?
NO! NO! NO! ABSOLUTELY NOT!
That is why I left Everquest. If you start making people camp spawns, you will totally ruin this game! Camping spawns is annoying, boring, and not fun at all. People want to have fun with these games.
Do you want story-missions that are profession specific or not?
Professtion specific
Do you want the quests to scale with your level? (So you may take the same mission at lvl 30 and at 100, only with tougher opponents?)
It might be better to make them different for more variety.
Do you want many small, or fewer longer quests?
Both, for the variety
Is it ok with you if we interweave the normal auto-content mission system in this, so that we can generate areas for you even in these story missions? (Or do you want only outdoor action?)
Sure.