Taking your advice into account, this means the England team should look like:
1. Mako
2. LCD (speed and go forward)
3. Sinckler
4. Launchbury (go forward)
5. Iseke
6. Wilson (speed and go forward)
7. Curry
8. Shields (speed and go forward)
9. Spencer (speed)
10. Cipriani (unpredictable)
11. Solomona (speed)
12. Farrell
13. Daly (speed and go forward)
14. May
15. Woodward (go foward)
I quite like this team. I know you said 8 needed speed and go forward, but Billy and Hughes are off the pace and Simmonds is not a carrier for tight heavy duty places. Which is why I felt Shields to 8 is the only option to cover both speed and go forward.
I know you say Cipriani is unpredictable, but his defence can be similar to Ford, i.e gives up the gain line and sucks in worried teammates which just tightens defence and opens the space on the wing for the opposition. Ford never shies a tackle, but as much as I love him, Cipriani will sometimes show no interest in the tackle at all.
Daly would perfectly suit more speed and go forward at 13, but that leaves us very bare in the back three, especially if we don't want Brown on the wing again. So I would probably leave Daly at 15, and try Lowzoski at 13 and hope he improves his defensive positioning.