Well if you combine the sort of one lap pace that has drawn comparisons with the likes of senna, with the mental robustness and calculation of the likes of prost/schumacher, then he is one hell of a driver.
I know that rightfully Leclerc has been getting the plaudits about his performance the entire weekend, but Hamilton kept his car in touch when it mattered with vettel and then completely battered him again when racing wheel to wheel. His adjustment on the first lap and then again when catching vettel to avoid any sort of contact was absolutely brilliant as well.
If he wins the championship this year then would this go down as his greatest ? All up for debate throughout the season I suppose which is shaping up to be a great one.
It's way, way too early to be talking about where Lewis winning the championship this year would rank amongst his titles. We still have no idea how the cars pace will be relative to one another across the season, how well he will drive, how well others will drive et cetera. Too many variables there and too much conjecture needed. As you say though, it'll be a debate that will progress across the season possibly.
In terms of Lewis merits relative to the other all-time greats, I don't think that he is quite up there with Senna on one-lap pace and I don't think that he has quite the racing intelligence of Prost either. I think that possibly Schumacher is the closest in comparison to Lewis at this point in time in that he (Lewis) has a complete skillset.
I don't feel that Lewis is the best that there has been in any single aspect of racing, but what he does have is exceptional quality in all areas whereas many others could be described as lacking in a few areas, for want of a better descriptive. As an example, Senna's one lap pace was unmatched, but his 'race intelligence' at times was questionable. With Lewis, there's nothing that you can really look at right now and say "Lewis is a bit shit at.."
I still feel that Schumacher is the best driver that I've seen, but that's just my opinion and it's a debate that's been done to death on here. Whichever way you look at it though, Lewis is - as you say - one hell of a driver. The c*nt.