Liverpool has't stopped yet. They're trying to hunt more talent to be recruited. They have done with Frimpong, Wirtz (medical check up), Kerkez, (still in the negotiation), and add Isaak as their last target. Their target to sign Isaak from Newcastle is just getting even more possible with Nunez who is still in the process to go to the Napoli(i expect him to play for that italian club).
I think we will see Isaak to wear Liverpool's jersey as he has open the move to the any big club that play in UCL.
I admire Liverpool a lot, I wish my club would do well this coming season so they'll be able to attract good players not just good players, top quality players, you can't call about 10 strikers in the Premier League and right off Isak so if Liverpool manage to pull that deal then they've gotten themselves a perfect top 9 and would still do well in the upcoming tournament. I think Liverpool is going to be unstoppable next season with the quality of players they're going after it seems their target this coming season is winning the Champions League, Kerkez and Frimpong in opposite wingback would make a solid defense and good support to the attackers cause they'll feed them with good crosses from the flanks, then with attackers like Wirtz and Salah mehn they're going to be scary next season.