Vini is a reliable player that his team can rely on - but why do some people think Real Madrid need to replace him? Vinicius has contributed a lot to Real Madrid - not only scoring goals, but creating so many assists. I don't understand why some hate him so much - for me he is a unique player, has character and has skill.
The "character" has always been questionable in his case. He's not worse that balloteli, but he's trying with every opportunity he has to be like him I guess.
Also, Vini is a self-centered player -- someone who puts his individual records and achievements first before the club's. So if I were asked what my take is on this matter, I'll say the same thing -- he needs to leave the club!
Since I have been watching Vinícius Júnior at Real Madrid, I haven't seen anything that is questionable in his character. The only time Vinicius Junior acts or behaves like Mario Balloteli is when he's abused on the pitch, which is normal for players to display a questionable character when they are abused on the pitch. Vinicius Junior has provided Real Madrid with so many assists, so I think Vinicius Junior isn't a self-centered player because if he were self-centered, like you said, he wouldn't have been providing assists to his teammates, and he could have always wanted to score goals all the time.