Honestly wonder whether people on here are watching us at times. The main thing Silva did across last season was sort out our defensive organisation as a team! Hence the large rise in clean sheets in the second half of the season
Clean sheets 18/19:
1. Liverpool 21
2. Manchester City 20
3. Chelsea 16
4. Everton 14
5. Tottenham Hotspur 13
And you are right that the attacking output improved too. Taken together, that's why we ended with a far better goal difference than the season before and more points.
Still loads of room for improvement, and why we can trust what he and Marcel are doing.