First and i think the most important, is the exp balance. You should consider to make it totally free of tomes-needed. You could re-add the rested exp. That way the players would at least have the option to grind or not(daily)
I'm actually getting really tired of seeing all these threads regarding this. Look at all the other free to play games out there. None of them that I've played (a lot of them) have ever allowed you to level entirely off of quests. The whole idea is that you either invest time or money, since you aren't paying to play there is no incentive to allow you to have an "easy" time leveling. Even the pay to play games that exist generally require you to do some kind of grinding in order to get to the max level. One very old MMO with over 10+ expansions is a perfect example of a pay to play that still required excessive grinding.
TL;DR - All (or at least most) free to play games are extremely grindy,
BY DESIGN.