No. I believe that the films should be seen and restored to the state that they were in when first released. The extra scenes you mention above, and I think there were some from 'King In New York' as well, if I remember correctly, should be relegated to 'bonus material' status on future DVD issues.
I remind you again of Mr. Shepard's comments that most (if not all) of the First National material compiled in the 1940's consists of 2nd or rejected takes. It's the usage of this material instead of the original footage that I have a problem with.
I have read (here, I think) that the decisions were your Grandfather's, and that - in fact, Chaplin was unhappy when he realized what had been done to the films. Please clarify.
What we're talking about is:
A) Shall we take the better version of a film and issue it, even though the print may be worn or damaged, or...

Shall we construct the film, or portions of the film, out of 2nd best outtakes which AREN'T worn or damaged, and issue THAT.
Since the 1940's, the powers-that-be have chosen B. I find this objectionable on both aesthetic and historical grounds.
You've spun away from the point, here. Even accepting the statement that Chaplin knew of / approved the changes in the films, the fact that he followed the 'prevailing attitudes about film preservation at that time' does not mean we have to follow them today. If it's a choice between Charlie's wishes in the '20's, when he actually made the films, and Charlie's wishes in the '40's, when he was in his dotage (and I mean artistic dotage here, not actual old age), I'd choose the former anyday.
I never blamed film deterioration or overuse on Chaplin, or his estate for that matter.
I think this is answered earlier when I talk about the replaced footage. Now, I should say that I'm simply accepting David Shepard's word for all of this, and the changes may not be as dire as his comments have us believe - I don't know. I have not seen enough original First National material to verify the degree of replacement for myself. Perhaps you, or others here who have seen some dupes of the original issues can comment on the degree of difference between these and the 1940's edits.