Would "Sgt. Pepper's" be a better album if.....

 With all due respect to the hypothetical question you posit here,  with my full disclosure that my intention is by no means to denigrate let me ask the rhetorical question if I may:  given that Sergeant Pepper is largely regarded by most all legitimate rock 'n' roll historians and critics as the greatest album of all time and largely "perfect,"  why would anyone even attempt to suggest that one could improve on perfection and or the greatest albums of all time? Why not let "sleeping beauties" lie and appreciate what you've got? :-) 

saintintn, I think MMT is far stronger than Beatles For Sale, which is such a disappointment coming after the very strong A Hard Day's Night album.  I do agree with George Martin that "the White Album" should have been a single disc and not two.  That's the one (of the later ones) with a lot of filler.

And, the OP begs the question:  Would Revolver be a better album with Rain and Paperback Writer instead of I Want to Tell You, Dr. Robert or Love You To?
These guys knew what they were doing.  They dropped songs or re-did them from scratch when they felt the quality was not there.  I trust their judgment.  SPLHCB is just fine as is.

I have to admit that I have not listened to the new mix yet, but I find it hard to believe that anyone would want to change the tracks. Personally, I could see making the drums louder or even reducing the reverb and EQ effects on the vocals. But the album stands up pretty well after 50 years.

Like many people, I was disappointed at the time that the radio hits,  Penny Lane and Strawberry Fields weren't on it. But after one listen, I didn't miss them at all. I was perfectly content to buy the 45 separately - which is what they wanted you to do.

Despite the chatter at the time,  this is not a "psychedelic" record. Oh sure, it has a thin veneer of sound effects and unusual instrumentation spread across it, but it really is a British work - romantic ballads, skiffle songs and dancehall music with American rock clichés almost completely stripped out, perhaps the most British that they ever sounded.

I like it just the way it is. 

The one song I'm disappointed that never made it onto Sgt.Pepper is Only a Northern Song which is a great psychedelic Harrison tune.