Aubameyang could be a good addition, I agree with that. However, he hasn't played even 10 games worth of minutes so far this season, and he is not considered like a good player that could improve a team anymore. I would trade him for Giroud and Zlatan together in an instant, but they need even better than that. He is 33 too, that's not really that much younger, sure compared to 36 and 41 then he looks young but they need someone they can play at least 5 seasons, that's a much better deal, which I think at oldest should be 29 or so. I don't know who they can get, but they need someone much better, and also younger.
If he didn't play regularly, it doesn't mean he is a bad striker. It is probably because the coach thinks his playing style doesn't suit the tactic/strategy. I don't know what Potter wants, but keeping Aubameyang on the bench seems not a wise way. Everyone knows Aubameyang is a good striker, he proved it once he played at Dortmund, Arsenal, and Barcelona.
Anyway, if you compared Aubameyang and Ibra-Giroud now, Aubameyang should be better. Ibra-Giroud is not at their ideal age to play football, they should retire already. But Ibra and Giroud still have the desire to play although they are not the main players anymore.
Yes, maybe that is what you say, they are not protagonists, but Ibra is a player who inspires a lot of respect, and although Ibra is a very emblematic player, one could say that he is an icon of Milan, personally I really like his style Ibra and Milan need him, in fact Milan should have more players like him, Aubameyang is a very good player and he has a lot to prove, at the moment things with the players are delicate, in the case of some teams they want to out of their stars and that's not a very good thing since there are almost no stars.
In another order of ideas regarding Real Madrid:
At Real Madrid they speculate a lot about having new Midfielders , but Ancelotti will not leave Modric or Kross, and with regard to the new Forwards I think that with Rodrygo they are very good , even so they are about to win a UCL and possibly If the results are given , they can shorten the gap with Barcelona.