@eurosky We do receive occasional bug reports regarding the localizer capture not being aggressive enough and it is something we have logged on our internal bugs tracker. From my personal experience, as long as you intercept the localiser at a respectable speed (approx 180 knots) it'll track the localiser well all the way from intercept to runway, but obviously the greater the speed and the greater the angle of interception will likely cause the aircraft to overshoot the localiser slightly. It's something that we would like to improve, but for the best results, we would prefer to rewrite the whole system from the ground which would take up quite a bit of development time. We should have more options available to us once the RJ has been released as we should be able to bring across any autopilot improvements from the RJ to the 146.
With the glideslope, any floating issues we believe have been caused by the weather changes in latest MSFS Sim Update (as mentioned in my previous reply), but the only reason I can think of for why the aircraft would fly below the glideslope is due to the speed being lower than the Vapp speed. It's also worth noting with glideslopes I'm referring to the glideslope indicators in the cockpit and not the PAPI lights at the airport, as the PAPI lights can vary in their accuracy depending on the airport scenery being used.
SID/STARs and holding are all handled by the FMS so unfortunately, I don't think we'll be able to improve anything from our side.
Thank you for the kind words though! It's always great to see people still enjoying the 146!
Mark - Just Flight