Glad you liked it!
Griefing the spawn area with long range monsters is something I've thought of too. It's really hard to actually pull off though; the final step is dying to something near spawn, which you can't even pull off with bad play when you have a ranged monster. You'd need to bootstrap it with several successive layers of leaving more and more dangerous monsters close to spawn, so it's a ton of work. It's also easy for me to undo with admin cheats, if it ever does come up.
It does look like wizards and druids ended up worse than morcs! That's an accident. Compared to a basic ranged attack, wizards have +1 range and druids have +1 damage. But morcs also have +1 damage so, uh, whoops.
I improved the druid/wizard stats for whenever I update this, but the nature of the persistent dungeon makes it so I don't want to do updates before 7DRL is over.