Harsher in Hindsight: Try watching the scene of Mickey at the cemetery after Wayne Allwine's death.note This short was the first time (outside of some brief segments for the 1970's New Mickey Mouse Club) Allwine did the voice of Mickey, no less. Same deal with Alan Young.note This was Young's animated debut as the voice of Scrooge McDuck, a role he'd keep with him up until his death in 2016.
Goofy plays the ghost of Jacob Marley in his attempt to warn Scrooge about what will happen if he keeps being greedy. In one episode of Goof Troop ("Wrecks, Lies, and Videotape"), Goofy poses as a ghost to warn Pete about what will happen if he doesn't change his ways. Sound familiar?
It's Short, So It Sucks: Many people wish that Disney didn't try to cram the story into 26 minutes and made it a full length feature instead.
Older Than They Think: This was largely credited as Alan Young's debut for his role as Scrooge McDuck, but he first voiced Scrooge back in 1974 for the vinyl album An Adaptation of Dickens' Christmas Carol, where he also voiced Cratchit/Mickey and Merlin.
Squick: Daisy Duck being the ex-girlfriend of Donald Duck's uncle may strike some as being a bit skeevy. Averted in the Finnish dub. Rather than using the Dickens names from the story, the dub instead uses the usual character names, except for Daisy who is instead referred to as "Goldie O'Gilt," Scrooge's old flame from the Klondike Gold Rush.
Goofy as Jacob Marley. Who can imagine sweet, lovable Goofy as a man who once embezzled from the less fortunate? Some could excuse that with the Rule of Funny that scene applies though. Besides, Goofy shorts like Motor Mania and several of the sports-themed entries back in The '50s proved that 'nasty' Goofy could work as a concept.
Daisy Duck as Scrooge's past love is also a little odd, given the age difference between the actual characters, unless you take into account that Young!Scrooge's design is based off of Donald's appearance from the 1950 short Crazy Over Daisy.
Averted in the Finnish dub, where the characters are referred to as the Disney characters portraying the roles, rather than as the Christmas Carol characters they are portraying. A notable result of this change is that Daisy is instead Goldie who up until this point was present only in the comics by Carl Barks.
Donald Duck as Fred Honeywell. Granted, Donald is Scrooge's nephew, but there's something odd about seeing Donald as such a cheery character that doesn't get angry. Though, when he's in a good mood, Donald can be pretty cheery, and this Fred does get angry, so it's not as unfitting as the others.
The Woobie: Mickey. He loses a family member to an illness, for crying out loud! Averted at the end.