I agree, but:

1. I wanted to make sure I am not just throwing an idea in the wind

2. The problem with couchsurfing now is mainly the poor website experience. I know this does not depend on the tech stack, but it's good to keep this in mind

As "features", I think those of couchsurfing are OK to start. Later on I think few things could be added:

1. jobs on the style of WWOOF and Work Away

2. Reviews, itineraries. Like I have an entire kayak itinerary for 2 rivers and I could put it in there or like where you can rent a kayak for a long trip, etc.

3. Guides. Like free tour guides, city walks, etc.