TFX still plays Pearl Jam, Soundgarden, Nirvana, Alice IC, Metallica, and RHCP. There is no reason they cannot both play U2.
Personally, I don't think there's a reason either station needs to play U2 at all. Neither station's audience is sitting by the radio keeping their fingers crossed for the next U2 spin. No offense meant, but U2, Talking Heads, REM and The Police don't seem to fit with the direction QMF is headed. They didn't test very well here 20 years ago. I can't imagine it getting any better for them. Sure there's always exceptions to that, but if it was me and I had to choose between playing that one REM song that might fit and a Skynyrd song that WILL fit, I'm playin' the Skynyrd