I still don't think he is required because Walsh is a very good kicker, the main issue is after Holmes and Walsh you looking at players who barely kick ever like DCE, I think the main issue is Ponga not available though because otherwise it would be those two and Cobbo can just play centre(ponga at 17)
He is at this point the best centre of either state and he would be first choice for that if all options where available.
I'm not familiar when Cobbo was in Qcup but I believe he also did conversions though, could be wrong.
that said not liking the current gen of spine players coming through with no conversion ability.
You do have the likes of Sam Walker who is a good kicker but he is more of a post DCE option rather than a 6 option.