I never like the 13 requirement to multiclass. It just seemed like an arbitrary number. Even numbers are what matters in this game. Excluding str and weight restrictions. However, think there needs to be a minimum of at least 12 or even a 14. 12 though makes more since IMO, especially for a basic level dip. So with that, my charecters will at least have a 12 in their secondary class.
13 is the average stat of a player character, for what it's worth. With Point Buy and the standard +2/+1, you can get exactly a 13 in all stats. ...this might just be a coincidence though.
Also, I don't think it's bad for odd numbers to matter. If they didn't matter at all, then we should just swap to an "ability score modifiers only" system.
