I think I was pretty unclear at the start sorry guys my bad.
This has nothing to do with Big priest or any other deck type, this was just a question I had on the design of an older card like Ragnaros the Firelord and its interactions with attack buffs or reductions. or lack of interaction for that manner.
Sorry I started another Big priest discussion this wasn't my intention, this whole question came up because I was actually watching a friend play hand-buff Pally when we started talking about this as he had a 12/12 Rag in hand, which was then hit by a Eadric the Pure the turn after he played it.
I only mentioned Barnes at the start as it was a much more common way to see Rag at 1 attack then a pally vs pally matchup where one is handbuff and one is running Eadric.
I came here for a question more aimed at game design but since Rag was wild I thought this would be the best place to discuss the design of Rag as a card, sorry again guys.
Mods if your around it might be best just to close off this post before the big priest fighting gets worse.