Sure, but the most common situation involves a Roulette/PuG - most of which won't bother marking or organizing 2x2's. In such a situation, you are better off splitting from the rest and just circling. If you don't see it after a certain time, chances are it's going to be heading your way. If you see it, just stop. The mechanic is only dangerous on the second attempt, as that is when people can be rooted in ice (which has a wind-up time where you cannot free them) while his meteor mechanic kicks in. If they happen to get rooted where that mechanic is going to land and/or you don't have ranged attacks to free them and/or they do not sprint or use mobility/defenses, squishies are going to be given a nice big bruise, if not just killed outright.

Sure, in any premade, or a group actually co-ordinating (or down the road when everyone and their mother knows how it works), you'll see more people adopt the 2x2 -- but by then most groups will start overgearing it and kill it before that swoop phase even hits. It certainly feels more timed as opposed to connected to a specific boss-health threshold.