I think if you keep expectations at what Kelly did for the full year last year and don't just focus on April when he cosplayed Aaron Judge for a month, it's not crazy to think he can repeat.
Smart money is he comes in a little south of that, that's the nature of attrition at catcher, but nothing he did last year feels flukey or unsustainable. Kelly's always a guy who had good K/BB numbers and above average raw power, and last year he managed to lift and pull the ball a lot more without killing his contact or his quality of contact. That's an impressive feat that not everyone can pull off, but there's no reason to expect it to expect it to just collapse and snap right back to pre 2025 numbers.