Not really. Brazilian forwards are nearly always over-rated. For a while there was an argument of Kaka or Ronaldo being the best players then they both went to Real and there was no contest. Then it was Messi and Neymar and they both went to Barcelona and again it was no contest. The second a pundit realises a forward is Brazilian they add on an extra rose-tinted layer. I hope Joelinton genuinely is great ofc.
If you offered me that over the next two seasons I'd probably take it. 10 goals per season isn't a terrible return so long as others are also chipping in, you'd want more of course.