At first I thought 5 maps is quite good for 800, but for 1200 it's just abit to high for me. Though i'm pretty damned sure people were going to complain about this no matter the price tag, so long as they are being asked to pay for something.
I suppose I shall be the first to rehash the old argument of no one is forcing you to pay for it. If it's handled like Treyarchs map packs though, I completely understand the problem as when I borrowed World At War I was told on a very regular basis I wasn't allowed to play in the match as it turned to a DLC map.