The standard fair weather set up for the Moment is with those two stakes.
The reason why it works like that is the Pitch Lock corner.(end triangle)
That pyramid shaped end gives support to the fabric and adds leverage so that you can have the shelter nice and taut.
In windy condition you should add the guylines to the main pole. That will give lateral stability and with those you have tension from the four sides.
In practice I set up the tent with the two stakes so that if I change my mind I can turn it sideways or move it very quickly, then once I am happy with the location I always have those guylines in place.
I use both the Moment and the Notch and still not sure which one I like best particularly because I always use trekking poles.
(so for me the Notch is smaller and lighter)