I don't agree with OP at all. We just beat Inter Milan, what a joy it is to be able to say that.
We do need something extra in attack but I thought the same last year. Pelle could be woefully inconsistent and if Mane wasn't scoring then we used to struggle. Long has his moments but he has never exactly been a clinical finisher, hopefully he will find form soon.
Redmond looks full of potential, Boufal just needs time to fit into the team and Austin is always a threat. We're fine.