The clearest tactical change was the transition from front to back, much faster than before with Winks tasked with playing direct forward passes to Dele or Kane, they then looked for first time flicks to either of our wide men cutting in. Happened several times most clearly for the opening goal.
At the back we saw one fullback staying deep, and one pushing up, probably based more on West Ham's weakness out wide than anything else. Dier was tasked with a pure DCM role which was excellent for 70 minutes but then exposed as legs tired. When Rose came on we lost shape as the one up-one back tactic seemed to collapse, West Ham suddenly got a lot more off the ball and we dropped way to deep. The quick transitions also stopped and our ball retention dropped alarmingly. Jose will have noticed.
First game but some very obvious changes, playing players in their best positions was an obvious thing to do as was playing to our attacking strength. More tweaks to come I'm sure ... but a very good start.