If anything I think they should keep the drop rates as they are and not implement tokens. These are mounts, not gear. Not all things should be able to be bought by getting x amount of tokens. if you're unlucky, then suck it up. If it takes a few billion runs to get your bird, then unlucky. And I'm still missing 4 birds (Sephi, Nidhogg, Sophia, Zurvan), but even I agree it should be kept that way.