Okay will you remind me what the "important things" aside from romance are? I haven't read HBP too recently but this is what I recall:
1) hormones
2) Dumbledore showing Harry collected memories so that they can better understand Voldemore
3) hormones
4) ~what's up with Draco~
5) hormones
6) the Half-Blood Prince book intrigue

I sort of loved how the Draco thing was handled, and even though I didn't fully support the change because I'm a book person
Wait how was he different?

I AM BASICALLY WAY TOO PISSED ABOUT RON TO NOTICE OTHER THINGS RIGHT NOW, for the record.