I agree. We are getting far too little experience from clearing monsters and quests. Levelling is too slow and not rewarding despite the new ideas. The balance just isn't right between melee champions and the new high level upgraded trained units (now that extra figures can be added later in the game). Spell casting champions are still extremely worthwhile as support for good quality trained units. But melee champions are only useful for a few quests and high level monsters with the overpower ability.
However, the exp skills should not be removed or reduced as it is interesting option for the sovereign or any champion that will gain a lot of levels. We will need those options when the assassin, warrior and defender skills, traits and abilities are sorted out.
I think all we need is a simple increase in the experience from all the combats we have by a factor of 2 or even 3. A simple way to implement this change and provide flexibility for player feedback would be to add another world option (like the one that determines monster frequency) and allow players to select a game with the current experiience rate or 2X that rate, or 3X.
This is still beta and it would be interesting to see how the rate of expereince rewards affects the playing experience.
Frankly the game is currently a lot slower paced and less interesting than FE and something needs to be done urgently or a lot of players will lose interest.