On the other hand, you're more likely to notice 'problems' with classical music (...) If you have any (even vague, hand-waving) suggestions for how to avoid this sort of thing, I'd like to hear them.
Well, I don't know how much experience you've got with dynamic compressors. But if this were a compressor, I'd be playing with its attack and release times, its ratios, and its soft-knee settings to take care of the problems you describe.
I'm willing to get into a long discussion about how a compressor works compared to how voladj works, but that's for another thread. If you want to get into that, Richard, either e-mail me directly or start up another thread under "programming". I'd prefer the latter, it would allow other experts to throw in their two cents.
___________
Tony Fabris