My G30 is the softest shooting of all my .45's and that included a 5" 1911. My mag was tough to seat for awhile, that gets easier. It does take a little smack to seat it, or a firm press, but it will get easier. I do carry 10+1 and have no trouble with it.
I've never experienced it, but the failure to go into battery was a common issue for the early G30's. The trigger bar (I think is what it's called) was updated. If yours has a number with a "-1" behind it, it should be the updated version. I don't know the facts 100%, I'd look into it further if your concerned.
Buying .45 ACP ammo does suck. That's why I bought a G19. Now I just alternate them when I carry.