I absolutely agree, but you also have to take in the fact Teto’s voice provider is around 30 now, and her original UTAU voicebanks were recorded over 10 years ago and were heavily modified in external programs. You can easily pitch-shift an UTAU voicebank and have it sound good, but SynthV and AI synthesizers in general don’t take modified data very well.
Teto SV is objectively an OK voicebank but she sounds far more like Oyamano Mayo than Teto. A lot of Vocaloid/UTAU adaptations for SynthV don’t sound ‘right’, like Gumi and Otomachi Una.
Tbh the only AI synthesizer to me that has character is CeVIO. CiFlower and KAFU have so much character to them- I’m disappointed there aren’t many male options.
It would have been cool if Teto/Miku/Gumi/Ruko got CeVIO ports.