Probably too slow for Constructed, but if we are using it, were probably using it with Gishath, Suns Avatar or some other source of mana cheating
Then, theres the matter of its artwork
Aside from that, Meowscarada ex doesn't have many problems against the meta
Besides him I'm currently running: Nightmare is still in there, mainly for nostalgia reasons (and a 7/7 flying for 6 is still a good deal in my format, especially when backed up with recursion)
We got that working in an "Experimental Frenzy," due to a lot of hard work from people who were not me
If you couldn't tell by this point I am totally behind Magic's choice to finally embrace dinosaurs as an official creature type in the game, excessive feathers and all