Momentum is a beneficial modifier and I prefer having it on during activities. The only modifier I hate with a passion is grounded. Grounded prevents me from speed running strikes. And all I get in the heroic strikes are noobs who want to sit there and kill EVERY SINGLE ENEMY THAT HAS EVER SPAWNED. I usually just run past everything and pull them to the boss, but when grounded is on, that severely limits my ability to do that. I’d rather grounded be removed from strike rotation than momentum be removed from heroic adventures.