He had a good game albeit with some nervy moments that you would expect from a game against Stoke at Stoke and not to forget he's only 18...
I agree though about the Bournemouth game, i'd be using Moreno on the basis that he will offer more on the attacking front than Gomez. I think defensively though, Gomez is solid enough, and he had a bit of a learning experience from marking Jon Walters and he will face a lot more different prospects than that as well though in this season.
I think he's too young to be considered the first choice left back, but getting game time here and there will certainly not do him any harm.