It’s not near to breaking point and Mane is a great player. I wouldn’t swap him for anyone on the list above, but if he does end up forcing a move - and there are no signs of that - then there are some very good young players who could be special under Klopp in the Mane role in Dembele, Sancho and Bailey. Mane is a few years older than all of them, and is currently better and more consistent, but the others have every chance to be just as good, and for one or two, maybe even better.
I don’t see Pulisic in quite the same way. Good player, but I’m not sure there’s the same explosive upside as the others. If we signed Pulisic I could see him playing inside more than on the wing, though he could also cover on the wing, so a young versatile player might be attractive to Klopp, but I’m waiting to see Pulisic burst through, and so far it’s been more drip, drip, drip. He’s a good player, but I don’t see an irresistible case for signing him at the moment.
In a way, signing Shaqiri for only 13M covers what Pulisic can currently bring to the set up.