I can see that, and I am sure many would be upset about it. I figured it would be the case given her "we will all be free" statement
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As far as I know, there hasn't been a time where the blood elves were offended being called a high elf. It wouldn't make any sense for them to be offended unless someone insisted on calling them that despite knowing the significance of the blood elf title.
I know there is one case in TBC where a high elf goes "im not a blood elf i wont suck the mana out of you" in a contemptuous way, but I think its mostly a way of making it clear of the difference in philosophies at the time. Of course, such a statement is no longer relevant since blood elves dont mana tap living things anymore