I understand your situation. In any case:
1-We always TRY to keep compatibility to existing plugins/skins -- this is not always possible as the code needs to be updated to fix issues and/or improve existing functionality so that newer/better plugins can be made. If we don't do this we'll just be stuck with the same features limiting the possibility for new/better features.
2-Radiator Support was not "removed" -- it was just not re-coded in the new plugin structure. This can still be done, in fact, we coded the new radio plugins based on demand, even the Blaumpunkt radio (which is self-made and has probably just about 2 users) got built just because we knew someone used it. Had we heard someone was using Radiator we'd certainly have done a module for it as well... please note that the main criteria here is NOT the fact that someone uses it, but the fact that we can TEST it somehow (i.e. by asking the user to try it, since we likely won't have anything that works with radiator). In any case, the Silabs module itself has been improved quite a bit in the new module, if there's ANYTHING at all that doesn't work as well or that has better function in Radiator (i.e. Dual Tuner), you should have said something right away, and we'd either implement dual tuner support in the silabs module OR coded a Radiator Module like before.
Having said the above, as hardware/technology evolves, we have to update the software and evolve with it... back in the days, Dlink DRB-100 was the coolest radio module around, today it's probably the worst thing (if you can even find one). In a couple of years, I'm sure Silabs will be obsolete, old and hard to find. RR has a 6 year old history now! For most computer systems 6 years is 3 lifetimes! Granted, I still own some computers that old, but I don't use anything that old regularly. So I'm not asking you to throw away your old computer+hardware and get new stuff (which seems to be what a lot of software companies do these days), I'm just asking you to take this fact into consideration... we will always try to support any hardware you already have, as long as you tell us you still use and ask support for it.
Just let me know what exactly changed in the GPSSPEED label (what it was and what it is now), we may just change it back and/or adjust it.
If you're willing to test the radiator support, we can probably work on that as well.