What are the expectations? We honestly don't know.
I think the reasonable approach at the end of the season will be - have we improved our playing style (in the main, yes), have we tried to win games (so far yes), have we won more than we've lost (so far no), have we brought in players that believe in the style and believe in the club (so far I'd say yes), has he improved players we had (well, yes, so far - i.e. Keane, but there's still work to do, and with others, i.e. Tosun, they've seemed to go backwards). Etc.
Obviously, the aim is 7th, but if we finish 8th, 9th, 10th or even 11th, I doubt it's going to see him sacked. It will probably see the pressure on - and rightly so - but it won't see him sacked. Because we'll just have to start all over again.