The only know issues are very minor and don't effect the run itself, like wrong textures on the heads of enemies and the other issue being in cutscenes and the only unskippable cutscene is the joker reveal in the steel mill, just because interest is low now does not mean it will be forever and even if it was there might be one person who would want to and there is no point in not doing so legit does not hurt anyone at all
the transformers partis a bad example on my end but they still have an emulator category still for people to use if they please and again there would be no harm in adding it
The wii u version has different mechanics and hurdles to go through while speedrunning and allowing emulators would allow people to try this category more
just look at the transformers armada ps2 speedrunning scene the only reason that speedrunning scene is active is because they allowed emulators and even have tutorials on how to set it up perfectly
There would be absolutely no harm of opening emulators open even if it just for the wii u version which alot of people don't own due to the consoles failure
why aren't emulators allowed?
i don't think it would be that different of a run