Here's something that has bugged me for quite a while. It's probably easy for me to offer it, but much harder to implement.
Every posting I read has the "Write Regular Review" and the "Write In-Line Review" button at the END of the post. Unless you're the type that will always write one or the other, when you finally decide, you have to scroll all the way down the post, click one button of the other, then find your way back to where you were when you decided to post In-Line.
If you always post Regular, then this isn't a problem at all. It only becomes a pain if you write an In-Line, for the reasons stated.
Putting the two buttons in a frame to one side of the post would be a way of doing it. This way you can read the whole thing, then click, or you can find something you want to comment on and click the In-Line button right at that point without having to scroll all the way down and back up.
Once you select In-Line, the post is put into a frame of its own anyway, so why couldn't you do this a little earlier before you have to decide on a review type?
Bill