You´re right when saying the rotors aren´t in good shape. I´m only waiting the pads wear out a little more to replace all.
I´m not a big fan neither about modifications but this modification is plug and play. In fact there were some models that came out with this vented discs kit (and the part number is the same as Honda), but mine was sold with solid discs.
The sound when driving, seems to disappeared when i changed the tires so maybe they are the source of the noise, but i´m not sure.
About that scratching noise and the wheel not freely spin, i tried in another car and it´s the same. However it seems it´s more continuous while in mine it isn´t. There are some positions when the wheel spins better than others.
Here´s the videos. Maybe it´s important to mention it was the only wheel jacked up.
[video]https://www.youtube.com/watch?v=mv6fzUd7E_U&[/video]
[video]https://www.youtube.com/watch?v=6UoXGvudDQk[/video]