The problem with Oozes isn't the lack of a commander, it's that as a tribe they don't have any support. In the same way that we already have
Ishkanah, Grafwidow,
Depala, Pilot Exemplar, and
Gallia of the Endless Dance, these tribes have a commander, but not enough supporting cards, and no supporting theme.
The reason why some tribes are more successful than others is because they have a unifying theme. Goblins are all about having lots of goblins at once. Elves are based on mana generation. Zombies focus or reanimation effects. When I made those cards for dwarf tribal, I made the theme tapping and untapping.
So if you want to see oozes as a viable tribe, what would the unifying theme between them be?