Corrosive should not give attack and defense in the same ult, and certainly not be as long as it is for what it does. Reminder that shield ult and resto ult are only defensive and last less time. Reninder that Magma Shell sees almost 0% use because corrosive is that much more better.

Though you can make the cost argument, it isn't a very strong one because, again, no one would be mindlessly spamming an ult in the first place unless it was as powerful as corrosive where it gives attack and defense and is best to have up as much as possible in all cases .

Corrosive needed addressing a long time ago. But hey, don't let the people that only play DK see this comment. They'll start posting bait just like the WW players once you start commenting on their broken mechanics. It'd be a shame if tank DKs wearing esoteric with max speed had to actually build offense to do damage or defense like everyone else instead of relying on an ult and overinflated overbuffed damage on skills, wouldn't it?

No. That sounds too much like balance.