Remathilis
Legend
One problem I forgot to mention in my first post is that the ability requirements are based on a stereotypical and narrow-minded view of each class. Multiclass fighters have to have a Str of 15. But what if I want to play an archer fighter or a swashbuckler-like finesse fighter that prefers Dex over Str? Nope, you still need a 15 Str. WotC built fighters tough! Rawr!
This might be the first argument that I've seen that is logical.
That said, I find it a bit of a non-issue. I don't think I've ever seen anyone play a full-class or multi-class character with less than a 16 in their primary stat. I just haven't seen clerics with 12 wisdom or a fighter with a 7 strength. It will prevent casual dipping (I'm going to grab 1 level of barbarian for fast movement, martial weapons and d12 hp) and force characters to play to their strengths.