So what if k-drives are not as fast as archwing? Not all melee weapon types have covert lethality so should we only use frames with blinds and daggers because it the best possible dmg? The only time you need archwing speed is during bounty objectives. There are multiple things in the vallis people do outside of those too. As for the itzal, the blink is nice, but an odonata or amesha "sprint" will still get you to your objective very fast. Just because its not instant does not make it bad.