That's a good idea of yours Zion about the subtitle track. I think it is a fair compromise if you guys mention it somewhere on your discs that changes were made and what they were. Maybe you could just do a menu screen that explains it. That way there will be no misconception that these are straight transfers. Because the wider they get distributed the more chance there is that someone will get the wrong idea about them.

See I'm a reasonable guy and I think that is a fair compromise.

The other option would be to make a seamless branching disc with both versions on it. I can help you out with how to do this in Maestro. The extra space taken on the disc would be extremely small because (I gather) you are only making at most a few seconds of changes. It's really not much extra work at all.