@PigsRule"Beside that, some random positions in three-check 960 would result in a forced win for one side or the other (as would be the case with 960 versions of other variants as well), so it would be a bad idea."
Ok, I have seen this argument many times now. However nobody has any concrete evidence that there are such positions that are forced wins. Could you provide any concrete evidence, instead of just handwaving to support your argument.
As I said in the other posts, I doubt there are any forcing positions like that in any of the variant960s. If there are any, they would be something like #13 or #20, far too difficult for humans to derive OTB, and besides they would be far too rare. A chance of getting such a position would be probably less than 1% of all the 960 different possible positions.
So, I would say that unless you are a machine, the 960 mixed variants will indeed be fun.
Of course, I don't mind this feature being pushed to the back for now, for more important other features like bughouse/crazyhouse, but discarding it is silly to me, especially when all counterarguments are lame and baseless.