Just as an idea for you, I see that there are some cards in this deck that do exiling. But removing cards from your graveyard would limit the actual cards that you have to play with in this deck. Exiling your resources and then having all of those tokens wiped is asking for a bad match up. As an alternative would you consider adding Black to this deck?
Here's an example of a cat deck that I was working on that's still being shaped up:
https://deckstats.net/decks/24826/764735-my-cats-are-black The reason why I added the black was due to the fact that I don't like to
exile my strongest cards and be left without those resources. When you throw away a
pride sovereign for a 4/4 token it essentially becomes a glass cannon. However, even if the enemy kills your cats they will all have their 9 lives due to the
supernatural stamina, the
wander in death and
without weakness. My own deck list has things that it can be improved on but this was just a
rough draft that I came up with a while back. You are free to revise, edit or tailor your deck as you please. Let me know what you think about this.