As a player with a good-sized-handful of alts (biped and dragon) I can say I've never had a problem getting them to about lvl 6 on the starting islands before moving on. All you have to do is kill a few more mobs or create a few more items than the quest asks for before you turn it in. I agree... Spirit Isle and Skalaar are no place to grind for any school, but with the time it takes to get to level 5 or 6 or so it's not quite gotten into the realm of grinding. I think it would be a great idea to implement a level requirement of let's say level 5 for a craft school and an adventure school to leave Skalaar or Spirit Isle. Even if you don't complete the tutorial quests, a vet could easily raise a new character to that level within an hour.
I agree with Holth, the tutorials are not all that engaging. Back when I first started on Skalaar I got extremely frustrated because the tutorials will point you in the right direction (usually) but they don't tell a new player who has no idea about how the game mechanics work what they need to know. I ended up going on to find a youtube tutorial for Skalaar because I just couldn't figure out what the NPC was telling me to do. The crafting system in particular always seems to be a stumbling block with many of the new players I've encountered. Several times I've checked New Player or Marketplace to find a new player screaming their head off about not understanding how the crafting system works.
If you add in some sort of visual aid somewhere to help new players understand the following: how to add an ability to hotkeys, how to edit a hotkey, how to scribe a formula and craft an item, what tools/abilities/machines they need to use and what they look like, how to set your keybindings, and a basic set of commands like: /groupinvite, /tell, /group, /chatinvite, /selectnearestenemey, /help. This could be done in a short opening clip when a new account creates their first character and sends them in-game for the first time. Any subsequent logins or characters would skip this and head straight to the game.
What I think is most important for new players is knowing how to find your own information for what you need, if that knowledge is provided right from the get-go they'll be less likely to pester others when they can't or don't want to figure out how something works.