Cute theme today of four diminutive animal names used in common expressions. Me, I grew up saying "kitty-corner" instead of CATTYCORNER, but I'll let it stand. (I prefer saving "catty" for "cattywampus," even though I never actually use the term.) The other three: DOGGYBAGS; BULLYPULPIT; and PIGGYBANK, are unassailable (or should I say un-ASPERSE-able?) in their acceptability. So thumbs up there.
DYNASTY (Ming or Qing, in Chinese history) and MENTORING (Helping a protégé) fit in more comfortably in the SW, and were crossed by the colorful quartet of CHARADE, AEGIS, GAUNT, and ELEGY. That's a nice corner. I don't even mind AGUE... but I suppose it's all what you're used to, eh? (I'm sure Colum wasted no time dropping in GIAN up top...)
And speaking being used to things - I'm not terribly familiar with YORBA Linda (despite the connection to #37) nor LUANDA, Angola, though I'm not proud of it in either case.
In all, I think the only answer that's truly just "filler material" is INE (Suffix with nectar or serpent). But in a grid with such a pleasant, simple theme, and so many interesting other bits, one little INE won't get a single ERG out of me. :)