I completely agree. It would totally save time in the game to summon your sparrow, for example; in the pvp if you where to do that it would save time and keep you from being a sitting duck while you where loading it in the ghost menu. Also bungie should utilise the touch pad on the dual shock 4 controllers, to at least give it some meaning.
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I think this is partially the point, so it isn't automatically an exit strategy where people go zooming off as soon as they don't have the upper hand.