I would just leave it as is for now really. Save up to 2 FTs, unless injuries or something like that happens. You have 5 nailed on, and good, defenders. Your midfield is really good, with all three of Chelsea, Liverpool and Shitty in the line up. Two very good striker options as well.
Kane scored this weekend, but looked the opposite of good. Why jump on him now, and take a -4 for it? Mouras spot is also unsure now that Son is back. I honestly don't see any benefit of shaking things up with a team like that. Not yet, at least.
You have so many different formations to play, and great rotation. Have you used your wildcard? If not, kudos!