Disabling auto-showing of SoundCloud playlists directly hurts my ability to sell my music packs on itch. It is not obvious at all to visitors that the new 'click to enable embeds' thing will display a SoundCloud playlist. Forcing people to click on a thing they don't immediately understand in order to display a thing they don't know is available is really... bad. I understand the security concerns you're facing, but if those security concerns aren't coming from SoundCloud playlists, please find a way to enable them to auto-display again.
Maybe you could add a custom-built field in the product creation template that is specifically for SoundCloud playlists similar to how you have one for a trailer video. To be effective at all, those playlists really need to auto-display. There are a lot of soundware creators on itch, and as it stands the current change hurts all of them.