Same with MANY patches in the Stock set. I'm glad you added a very instructive example! Bad on-the-fly factory patch programming is one of the reasons why many G patches don't sound half as good as they could, even with some older wav material.
Still I think many wavs also should be replaced themselves by better ones (nearly all of the clavinet wavs for example are lousy bad and you can't really save them by better patch programming) or completely other choices (like throwing out some of the too many bad quality piano-wavs and replacing them by better other instrument choices from SRX boards etc.).
I guess many of the synth wavs, especially those from analog synths, could also be reprogrammed to receive clearly better patches in many cases. The only problem is, that well done reprogramming eats up too much MUSIC user time, which is already urgently needed anyway for arranging, rehearsing and sequencing plus some sampling, after buying a workstation like the G which should show a better overall out-of the-box sound set, instead of forcing you to invest too much time...
I like especially your trombone patch a lot: you did a nice reprogramming job, Adam! If you really manage to treat trumpet and sax wavs in a comparable way, maybe we would even suddenly get some patches for playable brass live sets.
What were the main changes to be done, besides reoccuring bad reverb or pfx programming? For example: In the analog synth region I meanwhile stumbeld on many patches with too harsh Cutoff settings, too high Sustain curves, imprecise Decays: all in all leading to too harsh electronic plastic sound, instead of mirroring the deep, vivid and often warm character of the originals.