Even if they do ... they probably would want more detailed information than "update X". What exactly is wrong with MATE ?
And I remember an interview with a Leica employee some years back in which he specifically stated that there will be no Leica optics below 16mm (which you can get to with WATE).
Considering you can go up to (or, well, down to) 10mm with Voigtländer, at excellent image quality and build quality and low pricing, thats IMHO not really much of an issue.
Leica probably thinks thats a too small market for them and they rather leave that one to Cosina (Voigtländer).