I don't entirely agree, Botia got a bad name just because of 2 errors in the CL and then he got injured. We haven't seen lot of him really. On the other hand we know Siovas well before and after his injury and I can tell that he isn't the same guy after his return. At times he seems to not bother to chase down players, like his body is not allowing him to. I don't know if he lost weight or not but he looks like 100kg when he's trying to run. It is fortunate that his technical skills have not deteriorated as well.
Also when you have a good partner in defence you look better. Manolas and Avraam complemented Siovas. Now that both are gone it shows. Anyway I could see an increase to 75 but I really can't seem him above Botia. Botia is the best we have at the moment.https://www.youtube.com/watch?v=5NnCflwFOEo
Look at 7:10. The old Siovas could do that, the current one, I really doubt.