50-60m? lol I think you don't know who is Joao Felix. Think of him as the FDJ of strikers. How much did we pay for FDJ? How much did we pay for Dembele? I think something between 80-90m is more like it. If Jovic price is 80m, you bet Felix will be sold for much higher. This is the current state of the transfer market and current player valuations and wages.
Maybe I don't know who Joao Felix is but give me examples of clubs being in for him from last year since that's when interest for De Jong started to pick up. The dutchman's hype had time to grow it's my point. Personally, the first time I've heard about him was the 5th of February when this thread was made and I believe much of the posters around here and around the world have only heard about him this year.
De Jong meanwhile had suitors from last year in May iirc, has since gone and qualified for the quarters of the CL with strong performances against the likes of Bayern Munich. Has qualified for the Nations League final four with awesome games against the likes of France and Germany.
Dembele, when he was at Rennes, was wanted by half of Europe including us, has gone to Dortmund and confirmed the hype, playing even better than at Rennes so it wasn't just few months of playing decent in a second tier league. And even then, he cost so much because what happened that summer with Neymar's transfer and our awful, awful manner of dealing with Dormund. He was never worth the money we paid for him but we were taken to the cleaners due to circumstances that won't apply to a supposed Felix transfer.
What has Joao Felix done to warrant the same money as De Jong or Dembele again? Few months of decent performances and he's the real deal and costs close to 100m? Sorry, it's not comparable at all. The former 2 confirmed the hype in stronger leagues and had more than 3 months of good play against the likes of Beleneses and Dinamo Zagreb.
About Lewa, he is more like a poacher/target man, tall and physically strong, his job is to receive the ball generally aerial. Similar style to Drogba, Ibra (in his few final seasons), Giroud, Mandzukic..etc. Aguero, on the other hand, is a very creative gifted player, he is a good finisher but also contribute in other areas like pulls defenders out of their position with his movement, can be adept on the wings and play as a second striker although his preferred position is central forward.
Aguero from these last years is different than Aguero from 3 years ago when Pep came to City. Hell, he benched Aguero for periods of time because he couldn't hack it in his system with all the interplay, passing and pressing. Jesus was preferred instead of him ffs. To his credit, he adapted and now is a much more rounded forward.
Lewa, meanwhile never had such problems with Pep when he was at Bayern and I think you misjudge Lewa pretty badly when you say he is a poacher. He has even better technique than Aguero and his interplay and passing is top notch for a centre forward, as is his understating of pressing. For me, its not in doubt, I would have preferred prime/peak Lewa more than Aguero because, while it may not have been his fault entirely, I have seen Aguero play with Messi for the national team and it's nothing to brag about. I would always think he might replicate the same shit for Barcelona.
EDIT: Just to clarify, my main point is not that Joao Felix is not talented or won't transform into a world beater, just that he needs to confirm the hype for a year at least and against teams of CL quality, before we decide to splash huge money on him. We just can't make any more huge purchases for unpolished products that might make it or not. We need sure things and Joao Felix is not.