From the Forest Ranger, " SPOT - The forest ranger marks a target. Next round, that target will take triple damage." , nice implementation of an expose weakness effect. I'm not sure how "Forest" fits in, other than the idea of a nimble scout navigating a dense forest with ease (and, of course, the naming of the rolls). "Recon Ranger" maybe? If you couldn't tell, I really like the idea of making the name describe the draw Ignore that, I realize that the idea behind the Shield roll is a hail of arrows coming from the treetops, leaving the victims confused as to where it came from. I approve!
I feel like doubling the Archmage's current ether will leave them in a state of limitless ether, unless they suffer a series of really unfortunate rolls, or the QM has methods in place to strike at their ether supply. I'd tone it down a fair bit, maybe just restore 1 ether for every 2 enemies hit. As for the "Miss" roll, I'd suggest the ability to apply an elemental weakness of the AM's choice, rather than changing the type. It wouldn't quite make sense for a Bird to change from Flying to a Rock, after all, heh. I'd make the weakness last for 3 rounds, too.
Other than that, I like the way you think, Pie. I'm torn on whether or not there should be more requirements than simply hitting 30 if the classes follow a similar direction as the one's you're tossing out, as they add some serious benefits to the abilities of the basic classes and would make basic classes near obsolete. On the other hand, Basic Classes would essentially be non-existent for players past 30 even if the "Expert-Basic Classes" only offered flat numbers advantages, as there would be no reason nor advantage to not just advance to the EC for your class.