I use GoG Galaxy, and when it comes to patches, including all the beta patches, GoG gets the patches on the same day as Steam gets them, usually with in minutes, though there was one time it was a few hours later.
There isn't a 2-tiered class system for GoG. The beta patches are available to you equally as it is available to anyone else who bought the GoG version. You choosing to not use GoG Galaxy is your own choice, you are not being blocked from the patches except through your own choice.

Well I LAN a lot so multiplayer is good to me, I can do without the youtube raised gamers grieving and having no team ethic in multiplayer online; but in games like World of Tanks it can work in your favour due to squad formation with friend who have a monitor right next to yours you can point at locations and easily develop strategy with.
That said multiplayer games are lazy as shite now because unlike former console generations pretty much nothing is giving good ai controlled bots and the backbone is handed off to the 'fill ins' to actually make it a game worth playing.
It even effects single player in that you don't get roaming enemies or those with behaviour scripting for a general locale; no you get enemies that pop into existence like slavering monsters with nary a thought but to as messily kill with an innate homing beacon for a brain instead
-Rant off; powering down.