Lucasarts upgraded the previous Steam/D2D titles, so I bet they do here as well.
Only the old adventure games, which got a Windows compatible SCUMM engine, everything else that was Windows native to being with was put on the service is untouched.
Someone told me KotOR was tweaked to prevent the somewhat common crash problems, and this might bear out because 10 hours in I haven't crashed once.
Nah it's the same as the original disc version. Perhaps what was being referred to is that Steam version's config file, by default, has a line to disable a feature that commonly causes problems on newer systems; but it's nothing that wasn't available in the disc version, it just wasn't disabled by default.
And if they actually did make changes to the executable you wouldn't be experiencing them anyway if you're using the no-CD executable for our widescreen solution ;)
So I assume they will change some things to make these versions run perfectly.
Unfortunately, based on the above, I'm assuming they won't. I just can't see them paying a team to dig out, relearn, fix, QA, and rebuild the ages old (in software terms) source code for these games. Hell, chances are there's no one at the company who even knows how to compile the code anymore (what libraries are needed, etc.) or even where it is because the organization, archiving, and documentation practices at game companies are typically so poor. I figure the only thing special about the Steam versions is that they'll automatically include DosBox for the original Dark Forces like id did with the old Doom games.