Glad I found this thread.
It's ludicrous to remove this feature. As people have pointed out, you must either play the song - and play it in full mind, as plying only the first 30 seconds didnt download it for me - or download the whole album.
The latter is not going to happen for most music fans as, if you're like me, have hundreds of songs by random artists unavailable on iTunes that you've grouped. So for me I've a Random Dance album - 500 plus songs - I created myself as a compilation - not a chance im downloading all them just for a handful i fanct listening too.
I'd happily leave iTunes Match turned on all the time if it didnt drain my battery from 100% to nothing in the matter of 5 hours.