I think Klopp ideally wanted this to be a bridge year for some of the aging players and some of the new blood/youngsters. We're already transitioning the attack and will continue to do so if Bobby isn't offered a new contract.
There are younger players who need minutes (Elliott, Jones, Carvalho) who will have ample opportunity to earn them. At the same time, how many minutes at the highest level can the likes of Hendo, Thiago, and Milner continue to deliver? (It's not their ability, more their age and fitness record). Keita's down to a year left as well, so it's a big year for him.
We can assess throughout the season and make the moves for next summer.
It's a shame the last weeks of last season went the way they did, as it could've encapsulated the greatest season and took pressure off this season to help reshape the team for the future. As it stands, there's obviously a lot of pressure to go again and repeat and try to win the big trophies. Not saying we're not capable of that, but I do think there's some transition work to be done throughout the season, and it won't be without ups and downs (as we saw with the midfield today). That being said, I see these issues for every team, including City (especially if Bernardo Silva does go).
The World Cup in the middle of the season does throw some chaos in, so that could be to our advantage (well-rested Salah, Carvalho more settled, older players on the mend, etc) as well as new signees in January (like we did with Diaz).