>>6069716I also prefer to listen to Suisei over Azki too, but I have to admit Azki's technique is extremely developed and she does emotive singing at a level no-one else in Hololive can.
Suisei is working down a very different path as a vocalist here, but you can tell in her Utas she's doing her reps at chipping away at her areas of improvement. Azki has already been chisseled into her final form (I really cannot conceive how she could get better with the type of singing she has), Suisei is still a rough diamond in the process of being polished.
Risu could go down that route if she does her reps. Gura needs to land herself a network of strong producers (her mixers being so shitty suggest she doesn't have this network) and vocal coaches to truly progress, for all her natural talent. Only Based Moona is seriously doing her reps properly in my opinion.