This is an interesting question. I'll answer for myself.
First, trust me I do grumble - at least to myself - in particular where not only is the English vernacular name changed, but also the genus, leaving the specific latin name as the sole anchor to the historical body of literature.
Second, I suspect I am like most birders in that I can't even wing-it when it comes to nomenclatural rules, and rather out of my depth when it comes to understanding why genus names spontaneously change or are "erected" - seemingly it involves discovering precedence in ancient Sanskrit texts and declension of the nominative neuter third person in latin... think I've got that right. In other words, I don't want to pipe-up with something more stupid than usual, and look like a complete reedling.
However, even a grumpy old fart like me can recognise that it is necessary to have a universally-accepted set of rules when it comes to scientific names, and when the genetics show that a genus is polygeneric (if that's the right word), there really isn't much option but to introduce a new name for at least one genus.
And this is the point. The scientific name is the one that has to be "right", that has to follow the rules. It's the one that actually matters. And because of this, vernacular names don't. They can be quirky and nonsensical and meaningless and random.
I have to say that I don't really buy the "somebody might be confused" argument. To quote Yossarian, "Who's they"? Who actually gets genuinely confused by the fact that at least six different families use the word "tit" (which I believe is simply an old word for any small bird).
I've never met anybody who was confused by the fact that English vernacular names aren't as rigid and rule-bound as latin names, and often make no sense. And if I ever do, I will take the 30 seconds it requires to explain the above to them, and we can both laugh about how stupid the English language is.
In fact, I might even use it as a "teachable moment" to explain why scientific names actually matter, and how modern work on genetics has shown that some previously understood relationships between birds turned out to be convergent evolution, or just plain wrong.
So, while I am an admirer of your Indonesia field guide, I hope personally never to have to blurt out "Bloodhead!" or "Shade-dweller" in the field
lest I sound like a complete chickadee.