And if he splits this up, it's not worth it.

Why not? He still controls as much stake in proportion to everyone else as before. Xmv is the whole point, that doesn't magically shrink in influence because they can only vote 10x with it. The orcas that you want to be able to compete with those votes will also only have 10 votes, and they won't be worth any more than before or his any less. It doesn't change anything because he can give out as much of the pie by splitting it up and stacking slices, so that 10 slices will equal to a whole pie, or 30, as before. Being able to natively distribute xmv 30 times or 10 times won't change his influence at all, he can simply split it up and it will still not be any less than the hypothesized orcas and dolphins stakes, because obviously the proportion of his stake to everyone else has not changed.