Press select on your character's stat screen. They do also have to be playable characters for you to check (so you can't check Joshua's growths until he actually joins, for example).
With regard to the weird AI on ship levels (where enemy units will move onto spaces occupied by your units or try to attack you from outside their attack range), I suspect it is caused by the mast tiles being incorrectly set to 0 movement cost. I noticed that by moving over them I could move my units outside the displayed movement range, and I think when the enemies move over them it confuses the game about where they are supposed to end up. Unfortunately I only thought of it after I was past levels with mast tiles, so I couldn't test editing them in nightmare to see if it fixes the issue, but I think that's what's going on.
Other than that little issue, I'm really enjoying this hack.