Ancient-Red-Dragon: The "point" of Galaxy 2.0 was to bring in new customers from all the DRM stores, who GOG thought would flock to GOG due to their great desire to have all of their DRM'ed games in one place that
isn't Steam.
Of course, in reality, that was always a horrible idea, which is why it failed epically.
As for "Should GOG remove it?" ...that depends on what you mean by "remove it."
If you mean, get rid of Galaxy entirely, then no, that would be a horrible idea. GOG customers need the functions it provides like Achievements, Cloud Saves, and game time tracking for those who want those things.
But on the other hand, if you mean "Should GOG remove Galaxy 2.0 and revert back to the far superior version, which is Galaxy 1.2?"...then yes, GOG absolutely should do that.
GOG can't remove it; a lot of multiplayer is tied through it now; shit would figuratively hit the fan.
Every game sold on GOG that used it for multiplayer would have to be patched around because it was a feature it was sold as having else under consumer law it would no longer be fit for purpose hence would have to be refunded.
Now GOG might hurt doing that wholesale, wouldn't even be surprised if it crippled them financially; but they could do it.
Would there be a class action against them for it? maybe.
Would the betrayal of customers be highly newsworthy for an extensive period of time? Yes.
Would their market share increase or decrease? It would decrease.
Would they be as attractive to new customers? No.
Have I made my point yet?!?
Fact is they can't drop it like a sack of wet turd even if it is; all they can do is make it function more in line with the reality of what is possible, in a way that firstly minimizes cost overhead for running it and secondly is acceptable to their niche client base.
It will 'never' compete with the steam digital platform, because steam will never agree to open up and allow parity features (a lot of which would no doubt be tied to steam developer tools and such).
If GOG won't fight the industry to treat customers as first class digital citizens, then they'll always have a second class service at best.