Victory or Death-Arenas

I propose that at the 30 minute mark, a Victory or Death state begin in the arenas. At 30 minutes, everyone gets 1 pip of hp degen, with an additional pip of degen every two minutes until one team or the other wins.

Not a bad idea. I've been in a 65 min HoH match and I can see where this would help clean things up.

HoH has a timer. Whoever is holding the altar after 15 minutes wins, so I fail to see how you could go for 65 minutes.

Yes but there are maps without timelimit in the HoH way.
VoD there is a good idea, my longest match taked ~1h 45 min

I wasn't speaking just towards the Hall, but also towards the CA/TA arenas.