I think you're being a bit too flippant with the dark purple set. Many a time I've seen (enjoyed or hated, depending on the situation) cases where a hotel on those two lowly properties has played a decisive role in a game.
Those slots cry out for modules that are seemingly mundane and uninteresting (despite fairly large man pages), but when studied and wielded with full force can provide a rewarding sense of power:
|Old Kent Road||Mediterranean Avenue|| Pod|
Really, these two things deserve to make it onto the board somehow, and this is as good a place as any.