OMG.... MOH. I actually thought the SP was weak, however I LOVED the MP. I think for me it was the sound. Going from SP to MP there was a huge difference. You felt like you were holding the worlds biggest guns, yet your firing your pistol. There wasn't enough maps though. Least I remember going to the same 3 all the time. I've said this before about Crysis 2 MP, but MOH also has the feel of COD:MW1 (which is probably the MP game I've played the most).
You're very correct though. If you're paying $100 for a game, the SP and MP better not suck the giant ones. Anything I'm not too sure about now, im just going to hire out on my PS3 or Xbox.
Do not go gentle into that good night, Old age should burn and rave at close of day;
against the dying of the light.