Please add 2 features to benefit the DJM-S9 using decks 3 and 4.
The hardware has great potential with the switch between decks 1&3 and 2&4, but it's hardly utilized.

1) In 2-screen view, switch the deck based on the hardware switch. This should be a simple addition, since Serato can see which deck is active & deactivates the other.

2) Add a setting option to allow all decks to continue playing, regardless of deck setting. This way, you can control & play Deck 1, while playing a loop on Deck 3. Then switch to Deck 3 to control it (fade it out or whatever) without interrupting 1.

I don't fully understand the purpose of Deck 3 & 4 on a DJM-S9 without these features incorporated. Sure, I can use 4-screen mode to see tracks loaded onto extra decks for quicker play... but it also doubles the amount of things to look at that you're not using (4 waveforms when you really only use 2...).

Please help make this hardware feature more useful by adding these functions.

Thank you!