6 months is not really what I would consider "not too long"

Seeing as they got hit over two banlists, that's still better than TCGs NO hits over time.

Zoos were a dominating Tier 1 before the January banlist, taking almost 60% of all tops. They had been at that power level for almost 3 months until the new banlist was revealed.

and they'll likely not dominate for any longer than that; one par of anyone's expectations of a functioning banlist(unlike TCG).

The banlist got revealed with minor hits to Zoos.

Several hits and limits is not "minor" now, is it?

Then the new set comes out, and with it came Master Peace, which was yet another toy for Zoos

Not exactly relevant to the nature of a good banlist; unless you're saying he Peace should have been on this list too?

Baobaboon which made meshing Zoos and True Dracos really easy, and Ghost Ash, which killed both Invoked and Infernoids, leaving Zoos with absolutely no competition.

Apples and oranges, as that's an R&D problem; R&D and banlists are two different things; the banlist is a reflection player choices with R&D choices.