"I will always hire a lazy person to do a difficult job, because they will always find the easiest way to finish it" - Bill Gates.

Why use the quote? Simple - Players will always find a method that works to Their advantage. While SE can certainly modify some mechanics, by placing certain mobs in an area that have to be killed in order to progress, or collecting specific items in order to progress, regardless, players will continue to find the easiest and smoothest way in order to achieve this task as possible.

If you do not personally enjoy doing speed runs, that's well and good. As a BLM who has ran hundreds of Brayflox HM, I'll say this. If I'm queued into DF for Expert Roulette and I get Brayflox HM, I personally don't care if it goes either way, depending on the party make up. If I join in with a brd or a blm, then a SR would be ideal. But if I queue in with a mnk or drg, it doesn't bother me in the least if the group wants to go the scenic route and kill groups as they are placed. Regardless, stuff is going to die and quickly, it may add another 10 minutes to the run, big deal.

Speed Runs are a thing, they aren't going away, because players want them to remain and again, will always find a means to make it happen. You as a player can choose to participate or not, if your party doesn't want to participate, they can leave and you can refill the slots (I personally suggest asking LS/FC members to queue with In Progress runs for that purpose).

So what I'm saying is, it's not truly in SE's ability to alter this mentality. It's entirely on the player's side of whether or not they want to do it one way or another.