It's a pain to see the server being empty when some years back it was full of life and people were messing about and having tons of fun.
My argument back when they implemented this is still the same, not having a speed cap does not restrict new players from having fun but instead should push them into learning how to make the most out of their speed and learn how to control their bhops better in order to win. Same thing for Deaths that can mind game various traps and adapt to fast players in a fun way and get better at being a Death.
Deathrun will very hardly be what it was a few years back, significant changes to the attractiveness of the gamemode would have to be made and I don't think it's the focus right now, specially with SSRP in the mud aswell.
Although I don't see it happening