I rarely see Corvette in the Score Attack map options. 
Gruntpocalypse on Corvette is my favorite map/score attack game type.
Last night I went through 9+ complete voting cycles and only encountered Corvette 3 times.
Anyone else rarely see Corvette? Maybe I am one of the few that enjoy this map and game type.
Total Maps owned X available gametypes = how many options you have
The more maps you own the more rare that one Map and GameType combination becomes for you. So if you own all the maps… 3 out of 9 times is actually pretty often, not at all rare.
I would get it all the time on 2x. The AR is beast with those settings, if you are trying to max out that weapon, also PP.
If they’d get rid of the stupid repeating maps -Yoink-, it’d work out a lot better.