If it is possible, is anyone knowledgeable enough to swap out John's swimming animation for a faster one? I could be mistaken but I believe John and Arthur have two different animations for when they are in water, which makes sense because John is not supposed to be able to swim at all.
However, the John swim mods exist but all they do is counteract the instant stamina depletion. John's actual swimming ability is still really weak and he moves through water incredibly slowly.
I'm not 100% sure that Arthur is faster but it definitely feels like he is. If anyone could make a mod/provide a tutorial for giving John the same swim speed as Arthur, I think a lot of people who like roaming in the Epilogue, such as myself, would appreciate it!