Nine new maps + 2 new weapons for 12 (even 15) bucks sounds good for a REAL GOOD DLC.

Decimation and Retaliation in one pack means a better MP and more customers interested on buying the game.

I′m sure this pack will be avaliable in the future but it′d be a better idea to release it in a short time.

Tons of players will appreciate that.

since there's a store in-game

my recommendation would be to sell each map individually

Each map costs $2.50

buy 4 maps and get 1 free ($10)

buy all 10 maps for only $17.50