"Dear Diary" is basically the standard Diary-grabber episode. There is good humour to be seen in Mr. Whiskers' toffee-nosed attitude to reading Brandys' diary, but did it ever occur to Brandy to use a thing called memory where Whiskers' could access her information?
As for "Less Than Hero", things seem to be better than the previous episode. The running gag being that the Fantastic Hero comic that Whiskers idolizes shows up on cue. It just seems a shame that the first attempt at a superhero scene was rushed to fit the 5 minutes timeslot, thus ruining some of the main action.
But all in all, not a bad episode for "Less Than Hero".