I think we have capacity to be great again. We have a big fan base, we have the stadium, we have a decent crop of youngsters (saka, esr, martinelli) we have a big powerful CB and tenacious LB just coming in to their prime (gabriel, tierney) and we have a load of forwards fighting for places (auba, laca, martinelli, pepe, saka, willian). We have partey in midfield.
There is still a place in midfield next to Partey and maybe the spot Luiz and Holding are fighting for which lack quality. But those are two positions which could easily be filled in the summer (one of which by Saliba who we already have!)
Then the following summer we'd have our defence and midfield set and could look at spending on our attack to replace auba, willian and laca.
If we make the CL again and can spend a decent amount then that would change things too.