And, as an addendum to my previous point on attacking tactics, I'd suggest that it is actually the defending that still concerns me, despite the clean sheet.
We got away with a win because Harry cleared off the line, but Tarkowski winning that header with such ease concerns me. Wood and Barnes winning out on long balls against Dier and Toby as often as they did concerns me. And the fact that they had more than a few half-chances from knowk-downs concerns me.
Yes, we developed mitigating strategies for all of those- Hugo came off his line more after that near-goal, Woods and Barnes were surrounded by our players to pick up more of their second balls, and in general we dropped deeper to compensate for the space around both of those two when they won their headers. But I think the thing about that sort of mitigation is that it's temporary - a band-aid fix. Eventually, you just need better players you don't need to compensate for -defenders who can win the ball in the air, organize set pieces, and don't have to be covered for.
We still don't have that. If anything, that concerns me more than the attacking, which has been great so far (in the main). We'll get away with it more often than not, but unless this is one of those 'off' years, you really need to be perfect to win the league, and those weaknesses concern me. So, again, scoreline doesn't mean much.