I hope Canon realise this is part of their range which is really lacking. I still can't decide between these lenses for indoor low-light stuff and when I want more OOF than the f/4.? of my 15-85mm.

You mention macro with an extender, that's not something I'd thought of, is that an option that's available with all the "EF-S normal" primes? Or just the 35mm? That might sway the decision as a cheap way to have some macrofun.