In some ways, I'd like it as I felt her voice was smoother back then (I know someone is going to jump all over me for this). It was less wild in terms of the vibrato and her range seemed bigger. On the same token though, I feel like many would be exasperated by the fact that Ayu's voice would remain unchanged & static. People would probably get tired of her & her music, and her sales would probably be worse than they are now. I'm sure they'd claim Ayu would not be growing as an artist. So who knows?
Personally, I do prefer her 'old' voice. I felt like her voice sounded the best from LOVEppears, I am... (Duty & Rainbow were awful imo), and from Memorial Address to Secret. After GUILTY her voice started to go downhill imo. It got a little better with RnRC & Love songs, but then started to regress once more with PQ. Nowadays, I can barely stand her voice in ballads. I mean, HBYA was nice, but her vocals were just

. So basically, I think her voice has its ups and downs...Maybe there is no true "old" voice of Ayu.