Larian being aware, doesn't mean much if they don't make a post about or something like that. It is not mod related or at least from what I was told in email support, it is bad memory optimization and other hardware optimization problems, which are leading to long loading times.
To me its pretty obvious the problem is the loading times, from reading what he said. It doesn't matter if he thinks it has anything to do with the size of the savegames. Also they ignore every technical problems thread and use it as a bug dump list. So they can pin point the bugs, so you don't get direct help on that forum, even if you make a "better" post.
I mean, you make it sound like him not being very clear and maybe not being fluent in english he should not get help or expect help. Pretty harsh
