I quite liked JWP in the system too. He seemed a lot more confident (other than that brain fart aside in the itchen/chapel corner), took a few players on and got stuck in. I agree that Hojbjerg and Romeu have looked impressive and I think they can play together. I think Hojbjerg could be one of the two midfielders in front of the DCM, that run in the second half where he skinned half their team showed his got the skill and drive to play further forward.
That's my worry with the forwards - I was surprised at how much tracking they had to do, I thought it would have been more of the two CM's jobs to do. Though they did play 3-5-2 with wingbacks in the first half, so that might have had something to do with it.
Deinitely need another number 10 options - Tadic was great first half, but we really don't have anyone who could step into that role if he was injured. Plus I'd like another forward option, as currently I can only see Redmond and Long playing in formation. J-Rod of old could as well, but he still looks a shadow of himself