put another way - the QPAS already has full stereo separation by default. if you plug one of your QPAS ‘left’ outputs into one of the various left side inputs the TXn, you’re actually moving a hard left signal closer to the center of the TXn’s stereo mix.
I am not clear on whether or not the TXn/nearness pans the signals patched closest to the outputs 100% left and 100% right, if they do, those would preserve the full stereo separation…but all the other inputs are going to move the signals progressively closer to center.
it seems to me that the most natural pairings for TXn/nearness aren’t modules that are already stereo (since they already have a stereo image and in most cases you’d be diluting that), but rather multiple related (or not) mono signals, such as TXo, Just Friends in audio modes, multiple waveform outputs from oscillators, or any other mono signals you want to easily place in the stereo field. If you already have stereo signals present in your system, you might instead want to use a stereo mixer at the end of your chain to mix them with the stereo output of TXn/nearness.