goon I've just posted about this "caution" thing in the tactics thread. I think it's more about sacrificing some game state advantages to control match tempo over 90 minutes, coupled with a reduced average quality of actions in attack if anything.
Based on aggregate stats we seems to be passing just as much and just as progressively with possession just as high up the pitch or even higher, and with more of it, and taking on as many carries and 1-on-1s, etc as ever. I based this on the FBRef aggregate stats we are posting for this season versus last, for passing and possession.
Goals and assists are well down but I think it's two things: a quality and form issue up front, and game state effects.
I do think there must have been some quite joined up and carefully communicated thinking from Arteta and his staff about the XI's use of energy over 90 minutes—you can call it "caution" but it's not quite the right word. We are visibly not charging out of the blocks as we did last season.
I guess there's one other major issue, which is that we are mentally comparing this side to our best form last season, and not our overall season-long form.