This has definitely proven to be an issue that cannot be resolved to everyone's satisfaction.
The community is truly split.
There are three camps that pop up in every one of these very plentiful threads.
1. The people who want a 100% rip-off of the Unreal Tournament announcer or something very close.
2. The people who want something new and original, or anything but the UT announcer's style.
3. The people who've given up on the fighting of the first two camps and suggest that the champions do their own announcements in their own voices.
No one's right, no one's wrong, it's all very subjective.
That being said, I think the new female announce is far and away the best of the ones I've heard so far.