I've now finished rewatching Little Busters and Little Busters Refrain. When I first watched this series I wasn't all that impressed with it, but I didn't totally dislike it so I gave it a second chance and now I quite like it and enjoy watching it.
But, and it's a big but, my initial problem with the series remains. From the time Rin receives the first note telling her that there is a "secret to this world" we are aware that all is not what it seems and there is something "off" about the events in the story. However, even though I know what the "secret of this world" is I'm always left with the feeling that what is "off" is not the storyline but the pacing and directing of the series which somehow just seems to miss the mark. Little Busters Refrain is, in my view, much better in this respect and if the whole series had been directed in the same way it would have been much better overall.
I believe that if Kyoto Animation had made the series it would have been a VN adaption to stand along side Kanon and Clannad/Clannad After Story, not that I'm saying that JC Staff made a bad job of it, but I think they just missed the mark.