I'm pretty satisfied with this ending overall. Yuri and Tabuki found happiness together, Shouma told Ringo he loved, and Ringo and Himari remained friends. That's exactly what I wanted to see.
Nevertheless, although I got the gist of it (at least I think I did...), I wish it had been a bit more straightforward. Too much symbolism kills symbolism imo.
Edit: for those like me who might have missed it, here's the final and best end card:
I'm loving the symmetry.