Yep! It losses the spring action which makes it super sensitive and you find shifting going through two gears by barely touching it!A buddy at work has a 2007 M5 and he had a "floppy" paddle which he had replaced under warranty earlier this year. Is that the sort of problem you had too?
So you saying your drive one handed all of the time except when you need to up shift hihaMy beast is a 2006 with 17,000 miles. Paddle shifters still works great, no issues (knock on wood).
I use my paddle shifters about 90% of the time.
I was trained both hands on the steering wheel at all times except when gear shifting. Or except when I am rubbing my girlfriends legs : )