I'm not saying to play nothing BUT currents though, I just want stations to eitherYou are failing to understand that current alternative rock is not a single format... it is at least 3 formats that don't overlap. The problem there is that none of the three (or more) varieties of current based music is big enough to sustain a station.
A: actually interact with the audience, let the audience know what tunes they're spinning that are new, if they like it, keep, if they don't, get rid of it
B: play some new music and blend it with the classics (A la 91X but maybe 10 times a week for each song)
Classics aren't going to sustain a station. Look at the drops of 91X and 99X already after the announcements.