Ah, it pains me to see all those people new to the modding scene trolling on RP.
RP was completely wrecked by 1.3 update, that is the reason it took so much time to update.
Before that, it was more or less the same as IC2 and BC as far as updating goes.
Heck, I am sure that we sometimes had to wait way more for forestry, BC addons and IC2 addons, way longer than we did have to wait for RP.
If Mojang made their new redstone in a comprehensive way, it should not be hard to reflect the changes, and nothing else should really break it.
Textures is something that every mod has to work with anyway, so I am pretty sure that it has already been covered, just as the other mods did.
Just as an info, in the 1.3 update, even Forge took more than a month to release something stable enough to be used by the clients, where it usually takes at most two weeks.
3 people apparently think that this update will take more that half a year to complete, so even longer than the 1.3/1.4 took?