Every patch requires MattMatt to update the auto-splitter and since the official timing method has been switched to the speedrun timer, it hasn't been a priority to release it ASAP. An update for the auto-splitter to support Speedrun Mode is in the works and will (hopefully) release soon.
I'm not really sure what you're trying to do here but publicly calling out someone for some comments they said two years ago on a speedrunning forum about a completely different subject is not cool. If you have any concerns or problems regarding the leaderboards, feel free to message any of the moderators privately or discuss it in the speedrunning discord. This is just kinda... unnecessary. Also, the difference in Part 2 between 60 and 30 in terms of how the game acts is for the most part, identical. Yes there are spots in the game where the strategy would have to change in 60fps, however these differences have been determined by the mods to not be enough to warrant a separate category.
For Individual Level runs, the categories would not be "Hospital, Metro Station" etc, they would be likely based on Seattle Days. However, there has been a push in the past for IL runs but there has never been enough interest to warrant adding those categories. In regards to "Encounters Only" category, it exists for Part 2 in the category extensions leaderboard.