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

Marijuana is in the halucinagin class of drugs. 

So, I guess, if merely taking a halucinagin while playing or listening to music makes it psychadelic music, then Reggae and Rap are types of psychedelic music. Well, probably not.

BTW, i think SP is great just the way it is and it sounds  as good  today as when I first experience it back in 1972. Yes, that was well after it came out.