I received a reply to my complaint:

Hello,
We are following up to let you know that next to the green play button there is a little plus symbol. When you click on it, you have additional options. One of these included what the green button does. You can change it here to demo the style without the chords.

To which I responded:
Hi AAA,

thanks for getting back to me promptly.

The options provided by all those controls are numerous, and not exactly as you described.

Unfortunately, none of the options equate to the previous functionality.

Usually, when we are looking for a style, we need to audition many, maybe 20 styles before we find one suitable.

The style description is not sufficient.

We can tell within 2 bars if a style is going to work for our song or not.

We used to be able to flit down the list and hear very quickly a portion of the demo song, which would load instantly.

Now it takes up to 10 seconds to load, and only does so after multiple mouse clicks.

So to audition 20 styles takes 4 or 5 minutes, whereas it used to only take half a minute or so.

Is there some page where I can make a feature request for this functionality to be restored?