It just needs to not drop combat. It already untargets you and nullifies stuff like stormbolt/chaos bolt/freezing trap. It shouldn’t also drop you from combat instantly and let you drink / stealth / mount.
Total abomination of a racial. Like, just look at this and try not to laugh:
Nightborne - 3 minute cooldown, dispellable aoe 50% slow that also does the damage of a single moonfire tick:
Night Elf - 2 minute cooldown, instant combat drop, immunes damage and CC, allows restealths and instant drinks:
Yeah, remove everything that requires some form of thought or skill from the game. If anything, the popularity of Shadowmeld shows how well designed and fun the ability is. With a high skill cap as well.
Buff other racials instead of gutting an iconic ability.