Stating the reason of the poloniex delisting was because of the volume? go look at all the coins below gems in term of volume and come with a more logical reason then this.

The real reason is the amount of complaints poloniex received from people transfering coins in and out from the app. This very issue was reported multiple months ago and a proposition to switch over ethereum was made many many months ago.

They did not think it would cause a problem but uere we are many months later with an unsolved problem which still remain and is probably now being handled after seeing what kind of result it caused.