I had a very close experience as of the OP.
For me the killer bug is crashing. It crashed twice while making a Career Player before I gave up on modifying it and went on with the out of the box.
I am close to returning it too unless I hear otherwise with patches. 7 days are almost over and $100 is still high. The co-op option seems very limited. It would be fun to at least have each player do running between the wickets by themselves.
I still couldn't find an option to play co-op online. Perhaps it only works with a friend only.
For now, please fix the crashes and I will give it another go tonight. Heard about a patch so hopefully it will solve some of the pain. Loading takes a lot of the excitement and if you multiply it with crashes. It doesn't sit well with the players, does it?
C'mon guys, you've got our support but please don't let us down.