Aaaaand even so, they end up eldrich blasting and eldrich blasting after eldrich blasting with their eldritch blast all the time....
Eldritch Blast needs to becomboed with invocations to be effective. Sure, you can just use agonizing blast and EB BUT it is nowhere near effective as using spells and invocations in conjunction with eldritch blast. Invocations aren't deadly as 3.5e where instead of fly, you have a "minor" levitation and could permanently transform enemies into...
Anyway, EB spam is not necessarily bad. I can't enjoy DDO with any class but WLK exactly because i need to manage boring cooldowns far less with then...