The other Duration addons might need to return.
I get they were the most used addons for a while and with the speed boost they might have thought duration wouldn't be so important or would be overkill. But the counterplay is pretty much the same. Once you see legion run opposite directions. The legion will get one but not be able to catch up fast enough. But i feel bringing back some of the good duration addons or buffing the base duration could fix this issue and give legion some good map pressure. Otherwise im pretty much a fan of the changes.