Don't think Keita is injured again just being slowly eased back into it according to Klopp. Still I have doubts as to how long he will last when he does return because I don't think he is built for the type of football we play.
The drop off In quality is always what worries me along with injuries to our front 3 because that is where 98% of our goals come from. It doesn't matter either if any of them suffer a dip in form because he will still play them every week and for 90 minutes. The quality drop off is exacerbated by the fact that the back up players are rusty as f*ck and there is no consistency at all to the minutes they get on the pitch. They will need a run of games to find any sort of form and that wont happen unless someone suffers a long term injury.
There is no competition for places and our front 3 have been elevated to untouchable status which is bad imo.
We should always be looking to improve in as many windows as we can. Loads of people didn't want to get rid of Mingolet but look at how well that has worked out for us. There is always excuses and one of my favourites is that a certain player wouldn't suit how we play

. There is quite a few in our squad already that don't suit how we play or the position they get played in like reinventing Lallana as a deep lying player. Our Midfield is really defensive as well which will never suit the likes of Ox or Shaq. We don't even have a natural striker in the team either.
Anyway Mags we are top of the league and unbeaten so plenty will argue there is no need to fix what isn't broken and they have a point. Personally I just hope we never end up in a situation where we need to dip into the squad for a few starters.