HQ down time is a common complaint. The two solutions are tweak the game or change human nature so people don't mind how it works now.
One of those solutions is viable and the other is not.
If people drive a 12' tall truck or camper under your 11' tall bridge once a month, no matter how many signs and flashing lights you put up, eventually its just easier on everyone involved to put in a 14' bridge.
No radar, losing bases, getting surprised by a horde I didn't know was coming and searching for fights without dar isn't a big deal to me. Frustrated people logging off when numbers are already low is the part that matters.