User reviews are always on point, they are very difficult to manipulate because of big numbers. Manipulating individual "professionals" on the contrary is comparatively cheap.
Lets face it 'user reviews' can be just that 'by users' and not by (hopefully!) objective professional writers so any and all of them ought to be taken with a fair dose of salt.
Granted, Steams user reviews are generally as useless as user reviews anywhere else. At issue here is that you have to wade though A WHILE LOT of them to actually get any 'meat' of how the game may run & play.
I'd support any kind of rating system that might help filter out some of the nonsense as there ARE users that DO TRY to offer an informed opinion on game.
Gone are the days of review bombs and copypasta on Steam; replaced instead by review bombs and copypasta with extra steps. Valve's new Helpfulness System will rank helpful Steam reviews as such and place them higher on a game's store page.