What should I care about, besides density, when it comes to development proposals?

I'm trying to get more involved in my town's politics, taking to council members, maybe going to some of the planning commission meeting and things like that. My interest has mainly been to support YIMBYism and bike/pedestrian infrastructure. But what things should I care about when a developer proposed a new building?

For example, here are two that are coming up soon. This a college town with about 45,000 people. The university's enrollment growth (without building any dorms, probably thanks to the biggest local landlord sitting on the board, but that's a whole other thing) has put a lot of pressure on housing. So I'm glad to see fairly high density proposals. But I don't really know how to evaluate if there are things that could reasonably be expected to be improved about the projects.

https://www.blacksburg.gov/town-council/meetings/public-hearings/rzn-25-9-tech-terrace-prd-rezoning-request

https://www.blacksburg.gov/town-council/meetings/public-hearings/702-university-city-boulevard-prd-rezoning-request