There is no other way than adding new quality players to the squad to be able to add strength or improve the team's performance, despite the fact that it will take time to adapt rather than forcing existing players who are never able to develop.
In fact, if we look at the start of Ten Hag's arrival as Manchester United coach, he has brought in quite a lot of new players, but he has never succeeded in improving the team's performance.
I know that everything takes time and a process, but now Ten Hag's time is limited, maybe he only has a chance for 1 more season if he doesn't succeed in improving the team's performance, so whether he wants it or not, Ten Hag has to work extra hard and I think adding experienced and quality players in the Manchester United squad will be quite helpful.
To me isn't just more about signing in new skillful and experienced players into the team, it all about utilizing them for a positive results. Erik ten Hag has been given quite a lot of in my opinion to show full working, but it nearly that all those amount of time given to him almost ended up being a waste time and resources, if not for the fact he was able to lift the FA cup last season, which seem to cover up his mess and kind of calmed the situation and the pressure down at the momen.
Now given that he has been offered another ample of opportunity to prove his credibility, let's see what's he's gonna come up with the Manchester United's aquad this season, and which if he fails, I don't think he would have anyone to put blame on if he didn't do well and ended up getting sacked.