I understand your concerns, and I have the same issue: Burning out, put Hunt away until the next event is on, and then play the shit out of it again, putting it away after.
The event design got better, though: They now offered points for watching the stream on Twitch (2500/3000?), which did not compensate for two weeks "missing out", but helped alot to finish the event easily. +150 Points for 2000 bloodline xp/day. Without the battle pass, there is not much you are really missing out. Just play, ignore the battle pass. If you'd like, take up the challenges, but more to mix-up your playstyle, than trying to farm the event – but you'll still able to get at least 10 levels (10000 points) out of two weeks of challengens.
And regarding rumors: No rumors needed. The time in-between events got shorter, and shorter. I think the next one will be there around halloween.