Why do you think we're not playing 4-3-3 ? Do you think Silva's just not confident yet? He might be just nervous because the team aren't playing well, but maybe 4-3-3 will reenergise them. If it's Davies, Delph and Gomes, I think it should be fine, with Richarlison - DCL - Iwobi in the front
The thing I don't understand is why our tactics are not flexible. We have got maybe 4 players in the front 6 who are capable of moving around, and it would be great if our tactics were a bit unpredictable - (for the opposition not for us! )