This kind of thing is way more commom than people want to believe.
Many people have discussed this around discord and the conclusion is everybody always fell that when a new toon is released, not only it self, but their faction allies hit harder and seems faster and better!
We are pretty sure that devs mess up with toons to look better when they are released, so they are harder to defeat at arena and that make others to spend their money on packs.
U can check my Boba fett thread at reddit, it shows pictures of his execute crit for 100K! But that was when he was released, i don't see he hit hard as that since then, even with way better mods.
