Wrong STAR/Runway assignment might be a result of using ASE DWC. If it's the case try using latest 647 build with "wind lock" feature and maybe try enabling >Destination WX Zone<, personally I switched do "Smooth Wind Transitions" mode and now everything regarding runway assignment works alright.
About the airway warnings, just disable them by setting >Airway Deviation Distance=0<, it doesn't work for me either.
About vectoring, yes that's another thing to avoid... But you can make it usable to some point by setting desired >Minimum FAF Alt< in >SID's/STAR's< options, sometimes you'll get correct vectoring, but always very close to FAF and from time to time closer to runway than to FAF...
If you're flying some GA aircraft and use vectoring you can expect command like "reduce speed to 60 knots" while flying Cessna Mustang etc, but for airliners this one works alright so far.
Unfortunately I can't help you with that radio problem, does it happen always or was it one timer?
Even with all it's limitations I still prefer PFE over default ATC, but sometimes regret that I didn't choose that "other product", I hope this feeling will change over time and with help of few updates.
Regards,