Let’s compare ROTS to BOTFA:

huge CGI opening sequence with silly moments - check
getting rid of the villain from the last movie in the first 15 minutes - check
a character is in it only for laughs - check
characters appearing only as a callback to the first trilogy - check
cringeworthy romance - check
a good guy turns bad for selfish reasons in a stupid way - check
two CGI armies fight each other and noone really cares about them - check
a character steps on falling stones defying gravity in the most laughable way - hmm ok, I have to admit nothing in ROTS was that silly
overly long duel between the good guy and the bad guy - check

So yeah, I’d say they suffer from the same kind of problems, the acting and overall execution may be a bit better in the Hobbit movie, though.