People's shit interpretation of Ryuo is why they think these power-ups are ass pulls.
Ryuo is the flow of Haki.
You can flow CoA and CoC.
Luffy didn't have Ryuo but could use CoC.
Zoro had Ryuo but couldn't use CoC.
Luffy, in 1010, realised he could use Ryuo with CoC.
Zoro, in this chapter, realised he could use CoC with Ryuo.
If you can use Ryuo and you have CoC.
You simply need to realise you can use them together, and you have CoC coating.
Also, saying "advanced armament" is confusing.
To clarify: the "no touching" thing is "advanced" Ryuo.
So the semantics for this should be:
Ryuo + CoA: "Ryuo"
Ryuo + CoC: "CoC coating"
Adv. Ryuo + CoA: "Adv. Ryuo"
Adv. Ryuo + CoC: "Adv. CoC coating"
Hope this helps.