This RBR 2016 mod really makes RBR better for me and I would suggest it probably would have for a lot of new comers to RBR. The Vanilla game is renowned for being quite hard to master. This mod changes the cars and the physics to make it easier (slightly, you still need to learn how to handle a rally car). It is a pity that the guy (workerbee) that got this mod deleted couldn't have released it himself in my opinion.
The story is that the guy who made this mod nicked the physics bits from workerbee's NGP plugin. But the way I see it is that this game is basically freeware these days with no company claiming the rights as far as I know and that workerbee modded the physics of the original and then this guy came along and modded the modded bits and included them in a stand alone mod. Workerbee claims that this mod has ruined the physics but I think it has made them more user friendly and extremely good to throw around.
Anyway it seems that this mod is not available anywhere and that is a shame as it would get more people playing it in my opinion. Those who don't want to mess about with the long winded set up process of the other big mod and those who can't actually find and buy the original sim.
But all this is just my humble opinion.
But lately SLRE is getting my attention. The physics of this underated sim are quite similar to RBR and I love it.