Have to admit I find all the expected goals, goals conceded data really interesting.
If nothing more it gives me some "evidence" to throw at Liverpool supporting mates that they've hugely over achieved this season and last season (using the data given from understat.com).
However I feel the accuracy of this data is not quite there yet. If it was 100% accurate then over an infinite number of games actual goals = expected goals, and same for conceded goals. I don't think this would be the case with the current system.
It makes me question the extent Liverpool have over performed, and ourselves under performed. Is it really realistic that they can over perform like they have for 2 seasons running, or is the accuracy of the xG data in question?
I know my own opinion on this based on what I have seen, rather than the data, but I do like to back this up with good accurate stats