Do you have any reason to believe that all of the mathematicians whose entire edge to trading relies on front-run orders speed, have any other ability to profit than that?
If one's sole game is front-run tactics and said tactics get rendered moot, what next?
I think you are making the mistake that because that the best risk/reward for them right now is "front-running", that they are incapable of other strategies. Is it safe for me to assume that the only trick you have up your sleeve is price action (I'm just guessing here)? I doubt it is, but it is your method of choice because it does what you want it to do within a certain risk tolerance. If you had to, I'm sure you could implement non PA strategies. The algo guys are no different, and in many cases may be better at adapting than the chart traders out there. Not because they are smarter (in many cases they are smarter...), but because of the way they approach problems.
Brains > Guts
Mathematical Edge > Gut Feelings