I'd tend to think they got saddled with it but did not have the time to work with it as well as they could have.
To do the Open Bunker I had to move the verts themselves.
Same thing on some of SteelVikings stuff I did.
Many of the Games I've checked GR2 files on suffer the same problem.
The Dev's of many Games never went the extra steps that can be done.
Now SWTOR is an interesting use of the Granny System.
As is the First Templar.
