Looks pretty good to be honest, will be much better than HJ and LSV cheap options, they just look like lego grounds.
I wouldn't worry about the size of the ends behind the goals, probably the same size as your current away terrace but made to look small because that main stand is pretty huge, looks about the same size as our west stand. Very impressive. Can't wait for my first visit. Will be a great atmosphere in the away end behind the goals I reckon.
I usually hope for a huge home game to start off with for the fixtures but next season I hope our first game is Salford away!