Like I said to the previous poster, put things in perspective here. Peoples might not like how the installer handle some things but in the end apart from the password controversy there is nothing "wrong". They won't corrupt your computer, they are not a security risk (unless you download them from some torrent site), it won't work any worse than the previous version, etc...
But I am
putting things into perspective. I use pieces of software that are orders of magnitude more complex than GOG's installers, and yet they manage not to annoy me to this degree. It is precisely perspective - that this is, as you put it, a glorified self extractor - that makes what would normally just be an ugly implementation detail a huge problem relative to its purpose. It's one of those "you had one job" type of deals.
I mean, just as an analogy: I have no idea of how well engineered the components inside my PC are. It generally works well for me, and even though I'm aware that it must be stuffed with legacy designs that are far from optimal, it doesn't bother me. On the other hand, there's USB connectors. I can't tell you how many times I've tried to connect a device into my computer and had to flip around the cable because USB plugs are blindly designed to be symmetrical. It's a far smaller design detail than, say, whatever the particulars of the mechanisms in my hard drive are. Yet it is one I interface with directly, and thus discern its deficiency far more clearly than by knowing about, say, the advantages of RISC processors over their CISC counterparts.
It's the same situation here. Installers, by your own admission, are relatively simple software. And, given that this site loudly advertises certain philosophies, I have certain reasonable expectations of how I want this relatively simple software to be. For something that basically just has to carry over data over to my computer, disabling a type of access when it clearly could have and has been
done otherwise is, relatively speaking, put into perspective
, a giant problem. It undermines a huge part of the reason why I like buying from here. You might not care about it, and that's fine, but you can't deny that there is a discernible difference, and all I am stating is that I have a strong preference for the way it was done before.