I agree that that's not a good idea. I honestly think if you really put some effort into your level design (ya know, so it compliments the gameplay, like Titanfall seems to) that you don't need that many levels. Still, 3 regulars? Yeah, that's too low, totally agree. Never got into Counter Strike, but my friends were obsessed with it, and they played Dust 2 and Office for about 6 years. No new game modes, no new guns, no new levels, just the same loadout, the same map, the same game type, again and again. Hell, the first 10 seconds of every match was like a recording of the last one.
Bah, I don't understand that at all. Sounds mind numbingly dull.