I forgot they buffed the speed to 6sec now so that's good. I think it would be cooler if the other morph gave the speed buff though and this one didn't but instead didn't give CC immunity.
This ability and its morphs now last for 3.5 seconds, down from 6 seconds, but can no longer be removed with Break Free. After the effect ends, enemies will gain CC-immunity.
Eclipse cannot be break freed from, this is 100% intended (for some reason). However, the NPC Eclipse does not grant CC immunity once expired (not intended).