Here’s a suggestion!
Enable players to equip a Radiation Suit to each of their units in the Team Setup page. The Radiation Suit allows the unit to withstand radiation without sustaining damage. I estimate that the fair value of the suit would be about 5 team points (50 HP).
I feel like right now team points are just, in effect, more HP. Providing some different options for customizing your units with team points could allow for some interesting strategic decision making.