If our injury crisis continues, we may struggle indeed, but it's a big if. Also, we can sign a player or two in January.
Our rivals for top 4 aren't playing better than us. I doubt Brighton or Villa have played recently as well as we did vs Forest.
Throwing the CL away because we *might* struggle to make the top 4 is not something we are going to do anyway. If Dortmund could reach the CL final, we might be able to reach it next year too. Even without Rodri we have a better team than Dortmund, provided the other players are available. And who knows, they may be available.