I'm certainly in favour of more pets. More visual customization options are always welcome-- gives every player one more chance for that special personal touch. And of the options of adding cool new pets, Slayer monsters are definitely some of the more interesting possibilities.
I'm not sure if they'd be Co-Op Slayer Rewards or just rare drops, but either way... why not. Support.
I agree with unwieldypast about the co-op rewards.
I've made this to make the Td's and Glacors active again and give players a reason to a) do the again and b) getting more pets ing. Maybe even with 2 new titles of the collections.
MAKE TD'S AND GLACORS GREAT AGAIN! IF YOU WANT PEACE... PREPARE FOR WAR!