I hope it's okay to offer a suggestion for titans in this thread rather than making a new one. I wanted to pitch an idea that I don't think anyone has mentioned in the past, at least to my knowledge.
Years ago, we had a discussion about unwanted titans. Once someone secures a titan, no one seems to want to bother killing it for the TKP, and so it sits waiting for its defeat for days or weeks. The main reason for this is that the effort is not worth the cost.
My idea is if a titan is not cleared after 2 days and it is already secured by someone, a Bleed out/Decay system could be put in place to clear the titan, causing it to take 50-100 damage an hour passively. If in the future all epics will have their own upgrades then disregard this idea.