15 euro is way too much(that is if it will come to pc - you can buy 0,5 year old games for that here if you are lucky) for 5 maps and 2 of them are from cod4. if it was 10 euro i would think about it, it it was lower than 10 euro i would buy it instantly.
Bill try removing lightweight for stopping power - lightweight and marathon usually just put you faster into bad situations. And i would prefer scavenger instead of marathon - to refill my precious stun grenades and c4/claymores. And C4 is deadly.
From shotguns it seems that spas its the best right now - with stopping its sure to kill with one shot. AA-12 is also good but has nearly no range. Striker is fun to play with, and imo ranger is worst of them all.
Spas is also great to annoy g18 akimbo fa...users.. because it will kill them before you got chance to shatter your body to pieces with their ammo.
Only thing i find to be impossible to counter is tube - with danger close it will kill you 90% of times. It requires nearly no to skill to use and is damn annoying. You have slim chance of winning at close range due to danger-close safety in them(they won't explode)... unless you get hit with direct impact..