Niche categories like this have a track record of not having good engagement, right now having people submit and run more raids to begin with is a higher priority. As for massive community engagement our forums are not the best place, try our discord which is super active https://discord.gg/d2speedrun
It's nothing about benefiting "us" which I assume you're referring to the Moderation team. If you want to go more in-depth about what specific runs you feel need to be split I am more than happy to discuss this with you, as I stated above there are some runs that have been affected and have arguments for a split such as solo dungeons that involved hammers but the split would not be related to an egar nerf.
If and when you decide to discuss this topic with some actual detail I can help you out more but currently, there is no run that was affected to the degree of unbeatable because of the egar changes.
99% of runs in the game currently are able to be beaten with the exception of a few which are not because of the Egar Edge so categories will not be split. If you want to share the ones you feel are not beatable I am curious. I also do not know if you are in the D2 Speedrunning Discord so I will also link that here to have more in-depth conversations quicker with the community and our staff https://discord.gg/RrNNc6u