While initialy 2 hours PvP dead period was once reconsidered to 1 hour, why not go further? Some ideas after talking with returning folks.
All times below serve illustrative purpose for discussion, not a direct balance proposal (no need nitpick at them).
1. Class-based timer:
Fighters/Bombers - 15 min
GB/Cruisers - 30 min
Bcr/BS - 1 hour
Freighter - 30m
Transport - 45m
2. System based timer.
I think at some places which we can call "active combat zone", respawn timer can be turned off entirely, or be almost unexistant, like 10-15 min, just to get winner in a row. Some system could be a "danger/tensions zone" with respawn time halved. Such things already have some practice history, as you can remember.
3. Something completely different
For example - fighters launched from DM mothership, could have respawn timer as 10-15 mins. Would need tho some amendities in DM plugin as i understand, and addition of something to not allow mothership just sit above plane. But that just an example.