This has always been a problem with mods in any game that supports modding really. A mod may not update as the core game updates. It's easy to mitigate that with Minecraft but at a loss, and that is that you'll never get to see new stuff. You can keep playing the 1.4.7 pack but with no updated versions of the other mods (in case RP2 doesn't update) in MultiMC.
Personally I don't get too attached to mods, even if I like them a great deal. That's why I moved to MultiMC instead of the FTB launcher and started my own modpack. I updated to 1.5.1 because Ars Magica updated pretty fast but Thaumcraft and Forestry weren't so... I'll add them when they update. If they don't, well not much I can do. I want the newest versions in Minecraft, whether it's vanilla or mods. Minecraft comes first, mods come second.
But trust me, I know your issues 'cause I'm waiting for a texture pack to be updated but the process is reaaaally slow, maybe the t.p. author is Eloraam's brother
edit: That's why I mentioned in the specific thread that I'm starting to miss vanilla, the simplicity of it is awesome and there's nothing to worry about...
Personally I don't get too attached to mods, even if I like them a great deal. That's why I moved to MultiMC instead of the FTB launcher and started my own modpack. I updated to 1.5.1 because Ars Magica updated pretty fast but Thaumcraft and Forestry weren't so... I'll add them when they update. If they don't, well not much I can do. I want the newest versions in Minecraft, whether it's vanilla or mods. Minecraft comes first, mods come second.
But trust me, I know your issues 'cause I'm waiting for a texture pack to be updated but the process is reaaaally slow, maybe the t.p. author is Eloraam's brother
edit: That's why I mentioned in the specific thread that I'm starting to miss vanilla, the simplicity of it is awesome and there's nothing to worry about...