I'll have you know Kanon (2006) is very good. Admittedly not quite as good as Clannad, but then not much is. It's still far better than most things out there. You nearly made me derail another thread before I pulled myself together and posted here.
Ive heard something along those lines too. But ive been sub bias for a while now. Even if the dub is objectively better, these days I still go for the sub. (Though i don't really look into it beforehand anyway.)
Well then pretty much all bar the last episode of R2 is a waste of time lol. Higurashi after Kai is just a series of dodgy OVA's that get progressively worse. I don't actually mark things down for fanservice/related crap, but when that's literally all there is there's a problem. R2 being shit is mainly my opinion, but these OVA's are universally accepted as trash. Even I dropped them by the time I got to Kira.
That's a good trio of anime you got there. Clannad keeps on being awesome into After Story. But Code Geass and Higurashi kinda go to shit after R1 and Kai respectively. (R2, Rei and Kira drop the ball.)