Two modifications that would have made this event 100x better.
1) Killers who complete a vial, immediately start a new vial.
Killer queues are bad, and one of the big reasons is that it takes a lot longer to complete the killer half than the survivor half. So people who want to get everything play more killer. It's not just that hooks are harder to get than extracting Nectar (often as a survivor I completed my nectar in the first minute or two of the game, in less time than it takes to complete one generator... as killer, in the time it takes to get one hook, I get... 1/6 of the progress). It's also that the distribution is fundamentally unfair. As a survivor, if you're the ONLY one burning an offering, you still have a good chance to complete an empty vial (very good if you're the only one who hasn't completed the event totally). 3 pods appear, and 3 is all you need. As a killer, if you are the only one to burn an offering, you get get, at MOST, halfway through, even if you manage to hook on every event hook (not always guaranteed either, particularly when they're all clustered around on half of the map as I see in 50% of cases). (If nobody burns an offering in any match, a survivor can still fill their vial in two matches, while a killer needs 3).
But the killer's vials are quantized... they're not gradually filling the more they harvest, they get a set amount per hook... so why not just let them start filling a new vial when the old one fills. That way they don't have the feeling of a wasted game where FINALLY, after game after game where there's only 3 hooks, everyone runs petals, but the killer only has 1 hook left to fill their vials.
This makes it faster to complete the killer half, which helps with killer queues.
2) Once there are no survivors left in the match who can harvest, the survivors can still work on pods, but now to destroy them (maybe a 'stepping on them' animation adapted from a trapper-trapped pose or something? But I realize new animations are more work). They get just as much, if not more, points from doing it, just no event progress. This keeps petals having value after people have completed the survivor side of the event, but still prevents people greedily taking all the nectar for themselves. It also extends the game's middle/late phase and provides places the killer can look for the last survivor (maybe they're harvesting points). But more importantly, it provides reason for survivors to keep burning the offerings even once they're done.. they can harvest points. This helps not only them, but other players (both sides) who came late to the event and find hardly anybody's burning offerings anymore.