Silva had a shocker yesterday, no doubt about it. Going toe-to-toe with Spurs was madness but he could point to the fact about the referee and he can't exactly legislate for what Pickford did either, so he was quite unlucky in both respects. You're absolutely correct about the subs, we should have been more cautious after half time, 45 mins is a long time and we didn't need to go gung-ho straight after HT and risk conceding another, which is exactly what happened. We could have afforded to be more patient and bide our time and look for opportunities on the break.
All we can hope is that he has learned a great deal about the squad from these last 5 games. We are a good team, and should have more points on the board than we do, but he should have seen by now that we have a very soft core, especially in centre midfield when we start losing players. We need a striker too, we make chances but we just don't score enough goals, it's a real problem.