Having once lived in Minneapolis, I do remember the late, great REV105. And they did have a very diverse playlist. And yes, they also played some hip-hop. But there is a vast difference between Public Enemy, A Tribe Called Quest and the Fugees in the 90s (which REV played) versus Macklemore, Drake, Frank Ocean, etc. today. Perhaps it's just my opinion or my age, but hip-hop today really isn't very good. It's been reduced to cliches and grunting over terrible beats. Now, there is some hip-hop that could work on an alternative station. Snoop Dogg, the Roots and others are actually pushing boundaries, and have a lot of crossover appeal beyond Top 40 stations. I know that in my town, Milwaukee, where there are three CHR and one urban station pounding the crap out of each other, Macklemore and Kendrick Lamar would sound out of place on the local alternative station, WLUM (which does play some hip-hop).
On a side note, the new Daft Punk track is very, very good, and I'm glad WLUM is all over it.