So, Yurina Hase didn't "quit" her voice acting role. It seems that her agency removed her because she had too much anxiety from death threats that she was unable to perform her job well. Though the staff and fans wanted her to keep working.
It seems Yurina has accepted her unfortunate past and is proud that someone like Azumi Asakura has taken over Yukiho.
As of right now, I think, time-wise, Azumi Asakura has played Yukiho's role more than Yurina Hase.
I personally started Im@s early 2011 right before the anime. So, my first exposure to Yukiho is Azumi. I ran into Yurina only during my research on Im@s such as the 1st vision dramas, albums, games, etc. Still, it's sad to see her leave even though I see Azumi as Yukiho. It would be cool if Yurina kept going, so that she could be with the same VAs she worked with.
I hate rabid fans.