They'll probably nerf Smudge in an upcoming patch. I wouldn't be surprised at all. Which sucks because it's a really fun skill.
If you put a gun to my head and asked me to justify the current situation, I'd bet they probably expected that WHMs wouldn't have as many issues with pre-positioning since nothing they do locks them in place quite like PCT's leylines, their new Glare is an instant cast, they can lily while moving, old glare is a really quick cast anyway allowing for easy slidecasting, and their rotation is generally 1 button so it's not like they're gonna get lost in the sauce and caught by surprise very often.