Well, yes (at least in kRO updates). Like i said before, data.grf contains almost everything, but a few files you can find only in rdata, like some maps and textures (I guess that data.grf will get them later). Anyway, it's a very small file in this client, so no big deal to get it, yes? After all rsu-kro-renewal-lite patcher gets new updates for it.
Oh alright, cool. Thanks for the answer, and the release!