Coach needs to improve the players he has. It has always been that simple. We aren't going to sign 15 players and even if we do why do we believe they will be brilliant based on the past?
Have a look at Klopp’s squad he inherited mid season in 2015-16, and count how many 1st team players in that squad he won the CL and/or Prem with a few years later. Scanning the list now, I count only Joe Gomez, James Milner, Adam Lallana, Jordan Henderson, Firmino and Divock Origi out of his 25 man squad.
We’re in a similar position now to that Liverpool side squad-wise, with only 6 or 7 players (at a push) who look like they have the quality, character and potential to have a chance of being here in 2 or 3 seasons.
For me that is:
Mazraoui, De Ligt, Yoro, Mainoo, Ugarte and Amad.
There are a few others in the maybe pile too:
Onana, Martinez, Hojlund, Garnacho and Bruno.
To say Amorim has to simply work with what he has and achieve the levels of what Klopp did (which I assume were on the same page that this is the target?), then your point is a bit weak.
What we do need to see from Amorim is progress and his ability to coach his system to the players over the course of this season. That’s one thing Klopp achieved, despite a mixed bag of results in his first year. To aid him, I think a minimum of one signing in January that he believes he is lacking to make his system work (I would guess a LWB) would be sensible.
But ultimately, if this project is going to work we need to be ruthless with this squad, even if it means selling the likes of Bruno, Garnacho and Rashford to get there.