He was away with Belgium in early September too so even less time to train with us as he's settling in.
I would have him on the bench, I don't think Saiss is a great option on there at this level as a) I wouldn't really want him at CH and b) unless you're winning and looking to shut a game down, you're never going to bring him on for tactical reasons. But it's quibbling really. A year ago we were still wondering why on earth we'd bothered with Ryan Bennett, he had only played 95 minutes for us in the league at this point in 2017 (we'd played 13 games too rather than 9, he didn't play in the 14th at QPR either). Looked like he was never going to play. Didn't pan out that way though.
Nuno rates him, he'll play him eventually.