Wouldn't it be great if Sneak Attack was nerfed to only provide the 150% scaling on MP/RP on weapons that are finessable (for melee weapons) or that a Rogue is naturally proficient with (for Ranged weapons).
This could even increase the scaling to 175 to 200% scaling for these weapons (perhaps with enhancements).
Then all other weapons would only provide 100% or perhaps 125% scaling.
There just isn't any way that it should be as easy to sneak attack with a greatsword as with a Dagger.