This seems to be an audience recording excerpt from her Birthday event last month. Was just browsing youtube and randomly came across it.
Be Alive
Not too bad. Ummm but why is she still getting Nakajima treatment (aka one line in verse and occasionally one line in chorus) when she is more like Chisato of Juice=Juice now? lol
Unlike Miyazaki, her vocal is decent now, I'd say. Judging by the clip, Uemura can't do vibrato yet, but then again, there are only like 2-3 H!P girls who can. She can sing and in/out of falsetto - or if you insist females don't have one, "head voice" - decently when singing live and there are only maybe 5-6 H!P girls who can do that, so that's something. Her vocal breaks down a bit towards the end, but that's common among H!P girls.
If I didn't see the title, I'd have thought this was Oda Sakura singing as the muffled audience sound made Uemura sound like her - without the annoying vibrato-on-every-line thingy Oda does these days after copying it from Tanaka Reina
In Juice=Juice, she is probably the 2nd best singer now after Takagi - Miyamoto tends to be pitchy and Kanatomo has a bad technique. Perhaps the staff doesn't consider her as marketable as the other 3 as a singer and/or doesn't want to break the established pattern.