Radical... if you are changing the number of measures within a key song component like a verse or chorus or otherwise altering its rhythmic flow, I call that a radical change. Much more radical than simply adding or taking away whole sections, whether they are jams or solos, verses or bridges or different intros or endings. When you are messing with the verses or choruses themselves at that level, imho it's like splitting the atom. I know, I know, the GD never want to be thought of as nostalgists trying to relive their heyday, and always forging forward and furthur and trying new things. As James said, "Castles made of sand melt into the sea, eventually."
"There, in huge black letters, was 'The Grateful Dead'. It just... cancelled my mind out."-Garcia