vanilla descent length

I spoke to the race team and they explained:

Since races length and points rewards are tuned towards the least-performant class (in this case, the Ranger), most classes will have an easy time in events such as Descent: Champions and Descent. There was an effort made for this race to be less frustrating. It feeling much easier is an outcome for experienced racers.

Hopefully, by next balance patch the gap between classes shouldn't be as big as it currently. The introduction of Shrapnel Shot helps Rangers a lot. Eventually Descent: Champions and Descent may get Act 4 content to make them longer, which will also help with their duration.