As there is no good reason to change something just for the sake of change, the same can be said about not changing anything for the sake of keeping things as is, without even contemplating changes or improvements. Some people seem to counter-push their agenda, against an agenda, and complain that the ones started the name changing have an agenda. Talk about hypocrisy.
There are many good reasons to change bird names. For example, a Grey heron over here is literally a Blue heron. In the early days it was a Grey heron as well, so I would vote for a change immediately.
Some names are just confusing (Black-tipped cotinga for example).
Other names are spot on and don't need change (most of them).