I think this is a great idea! It would probably work only on normal enemies anyway and not on bosses, so it wouldn't be too overpowered. It would be great for dungeons.
Yes, you can LoS the enemies, but often you have overeager DPS that just attack the ranged enemy like crazy or a healer who casts a Regen on you before pull and the enemies are all over the place, which can get infuriating.
So if the draw-in has a longer CD it wouldn't be up every time, and you wouldn't be able to use it on all pulls, so you'd still have to position yourself and the enemies.