There are other ways, but I want it to stand apart. We have velosrachos, the creature with 2 rampages, we have the swapper gamma, and we have the distractor, staller, and nullifier procerath. But then there’s this, which is too generic. Immunity to deceleration would set it apart from the rest
Firstly, don’t compare it to Monomimus who’s intended to be better.
Secondary, neither stun nor decel resistance is cunning. Aquila is a pure cunning creature and shouldn’t have any of these. Think of something else, like a massive damage buff.
One is 102 speed and while it can boost its speed usually against a resilient it won’t be able to. It’s cunning but it sacrifices speed for camouflage so really the decel resistance doesn’t help unless the resilient in question doesn’t use a resilient move but rather decel
Although considering if it stays the same stats and nothing else is changed besides that I think it be fine
You could add rend resistance, add a cleanse to its basic move (to help it against Thyla) and then change Distracting Impact to Thwarting Impact (not Revenge, mind you) and give it 131 speed.
Oh, and also Swap-in Dodge.
It might not need all of those things, but it could totally use swap-in Dodge and 131 speed.