@Rune_Alchemist Not necessarily. Like I mentioned in the OP, there's nothing stopping a mage from wielding a two-handed sword. It works both ways, so there's nothing stopping a knight from focusing on spell-casting. The only disadvantage to this is that knights won't be learning skills that would complement spell casting.
If you can't pick a lock, then go ahead and try breaking the door down or destroying the lock. No one's stopping you from doing those things.
Anyway, you aren't forced to deal with this if you don't want to.
How are stats going to affect certain things?
This questions is to vague since mostly anything can be affected with stats. I've listed down what each stat does, so you can safely guess how a certain stat would affect a specific action.Will there be more than one option/way of dealing with something that would be more 'class appropriate'?
What do you mean by class appropriate? Like I mentioned before, anyone can attempt to do anything. One's class will only indicate some of the skills that you develop. Want to be a chef magician who's a blacksmith, go for it. Not the most efficient way to do things, but go ahead.And how often if I 'attempt' something, will I fail because I didn't have the stats for it and forever be locked out of that opportunity?
What type of situations are you imagining? I'm not really sure what your train of thought is. Stats are just a quantification of your character's traits and capabilities.And how often will I get rekt because suddenly I got a bad roll or something, and could I theoretically fight something twice my level and win if I am careful/tactful about a fight?
The answers your looking for are quite situational. Do you think I can give you an answer? Are you expecting a yes or no? Or some sort of percentage of success? If that's how you're looking at things, then you're just stressing yourself out. 