To answer the OP I'm not necessarily against speed runs but I don't like the way they work right now. To me it just looks like a very cheap way to implement the principle of "time attack" into the instanced raids. I mean there's 3 50 dungeons and for all of them it's the same deal : run through 90% of the enemies and rush for the mini boss and then do the same for the final boss. I don't have any fun doing that, no matter what job I'm playing. Not the mention that it makes the dungeons repetitive right from the start.

I think that, as some have already suggested, it would be much better if we had to make choices between multiples objectives once we're inside the instance. Go there in x minutes to get a mini boss to pop which will cause another path to close for example and to stick with the time attack thingy. Also, and this is maybe my biggest concern : make every enemy worth fighting against. Randoms mobs don't have to be extremely hard to beat but at least give them some valuable drops or something like CC where you have to kill some mobs simultaneously for something to happen so we don't just rush through everything to get the speedrun done.