What Liverpool needs to is get new contracts for current players and not think about getting new players. Mo Salah might be getting old but he has 2-3 more years in him and can give a lot to Liverpool. The only thing is if Mo Salah isnt greedy for money and takes the saudi deal. Trent is replaceable but is still really a good player for Liverpool
It's actually essential and important they get new contracts from some of the key players makers who have got a whole lot to do with the club growth but it still doesn't mean they are going to relax and not get new players if the need be especially around their defense, Salah isn't and is yet to make a clear and official statement about an exit from Liverpool, although he may later on in the future but for now I believe he will still want to give his best to Liverpool a d the team will not be lax about making sure they still get him in the team for the time he still appears very much productive enough for the team.