Draskyl is better than nearly all of the other casters, Merlini being the one notable exception I can think of. It doesn't sound like a proving ground so much as him getting shafted for the more popular, but less capable casters. Not sure why Valve wouldn't want to give him a bigger role, but I agree that his reaction is a bit severe and causes unwelcome comparisons to the Tobi incident from a few years ago. I'm more inclined to sympathize with Draskyl because at least he's doing this pre-event rather than during the middle of it and he is a considerably better caster than Tobi, but it's still an immature move. Neither side looks good here.