Yeah probably Cymro. Granted, Faletau isn't huge either, but Navidi has definitely filled out.
I'll edit this post with more thoughts soon, but not sure about Dacey. He likes open play and all, but not sure about the tight. Cardiff's scrum is a mess and lineouts not much better either. Granted, props and locks haven't helped. King has been good for Ospreys as a flanker, honestly a better option than Lydiate in some aspects (ball in hand, lineout).
Very weak up front, forgive us Scarlets! Jarvis would be second choice at Newport. Andrews, well... Can't drop Halfpenny from fullback, offers too much stability. Williams has been good (pains me to say) but he can be a wing and stand deep if needed. I don't want to go NZ and fill the back three with fullbacks, but I think it would work well enough. Cuthbert has been outside a dire Cardiff midfield, so I can see his frustrations. North not bad for Saints from what I've seen. Midfield is a worry, not sold on Roberts overall. Davies struggling for Clermont.