Two new games coming from Arcen! Exodus of the Machine!And Skyward Collapse!
I'm with the no-shrinking camp. If they can't be repaired anyway, there's not really any reason for them to also slowly decrease in effectiveness over time, right? I also wish they would do something neat on death, like Martyrs, to make their death more of a neat event and less wasteful feeling. I don't know what would fit them though. Some kind of area defense buff that persists for a few minutes, or a ghost forcefield or something? Dunno.