Beat Sync in Performance mode with ProDJ Link/USB

Hello Pioneer,

WHEN will you activate this function? 
We know i'm not the only one asking for this.

It's a bit stupid actually I have a XDJ-XZ controller, but :
-You can only use 2 decks in USB mode
-You can use the 4 decks in Performance mode

Tu use my DDJ-XP2 add-on controller, I have to be in Performance mode... that's fine because I want to use 3 decks, no problem with that.

But I have a DJS-1000 Sampler for live sampling, too...
I can use the Pro DJ Link with the sampler/sync in USB mode.

But in Performance mode the sync is disabled. 
The only workarounds are : 
1) use an audio cable for XDZ-XY output to DJS1000 Input and read the bpm all the time
2) use Ableton Link with a bunch of ethernet connections, but this disables the tempo sliders on the controller. 

Why is not possible to : 
-Control the Ableton Link master temp with the tempo sliders on the deck?
-Just use the beatsync when the DJS1000 is connected to the computer in USB or with Pro DJ Link?