Yeah, that's fair enough. Cédric was solid in the final games but I'm always worried when he's there and I believe Cancelo will prove to be a liability defensively. I think Nélson will end up moving this summer so maybe waiting if he can perform everyweek at a higher level is the smart thing to do.
Why you worried? Cédric is solid in defensive terms and he is a good crosser (just look at the tables for the Premier League). He deserves his spot in the national team, at least for now. I don't think RB is an handicap in our national team. I worry much more about our Center Backs since Pepe, José Fonte and Bruno Alves are nearing the end of their respective careers.