This is not a good time to adjust fees as price is expected to double if not triple tonight! Probably in 2 to 3 months would be a good time to re-evaluate and adjust fees.
Poloniex could do something any time they like, but it looks like they can't even be bothered to get out of bed these days let alone respond to user needs.
And is there any particular reason for the price to double in a few hours?