There are alot of complaints about the filler on this album and that none of the songs are the strongest. But I feel that is not what the Beatles wanted, they weren't concerned with what would make up the strongest album, this was about seeing them for what they were. And I believe you can hear it in the album, you hear each song that the Beatles write reflecting the particular writer's personality. You can hear John's Meaningful lyrics and rockin music but see that he isn't afraid to pick up an acoustic and keep it real simple. You can hear Paul's wonderful music arrangements with somewhat silly lyrics (sadly a divider of Lennon/McCartney)but also that he can still do some good old rock music. You can hear George's social/religious messages in his songs plus with the best track on the album in While My Guitar Gently Weeps his emerging as the dark horse. You even get a glimpse of Ringo in his one song writing effort.
Some little jokes are on here to, like the rockin song Back In The USSR made to make fun of the Beach Boys and Chuck Berry's songs Back in the US. Glass Onion to ease the pain of critics trying to figure out songs on their last releases. And Goodnight which was originally written by John to be a simple bedtime song for his son just played on guitar, but he thought to make fun of Disney and just go overboard with orcastral arrangement (which I personally think is quite funny after growing up with the old Disney stuff).
All in all I gave it four stars because some of the songs could have been left off like Paul granny song Honey Pie and the weirdest effort ever by John Revolution #9. And as for filler songs there is always some people that like them better than all the ones that everybody else seemingly likes, and there are like possibly 4 albums on the planet that don't have any filler so I never saw the issue with that anyway.