Why would you ever build research labs on a tech habitat? Just make research districts and put housing on both slots. No rare resource necessary till you fill up all the districts. The housing means you don't even need entertainers for amenities. If you need more building slots, just add more habitats.Voidborne without extra 2 districts seems so useless. 2 extra building slots dont do much, basicly that means you build one housing building and one researchlab on tech habitat and each of them still cost rare resource to maintain. Maybe this makes refinery habitats betters, i suppose that was aim of this "upgrade".
Ignore voidborne and take any other perk. Almost all of them except maybe mastery over nature is better if you are void dweller.