I have just watched the clip in which he is discussing his time under Ancelotti and it makes me feel disappointed in the sense that other managers have not played to his strengths, but also in that we have lost our supply line over several years.
When he played under Ancelotti, the emphasis was on one touch finishing and it proved highly effective. Thinking back a little further, we had a better supply line at the time (Digne, Sigurdsson, Rodriguez, Richarlison) compared to what we have had in the years since. Having said that, I do think that our supply line is perhaps starting to recover. The lack of the supply line in those years, as well as persistent injuries and ultra-defensive tactics have probably led to his goal tally nosediving.
It is disappointing that we have not played to his strengths since Ancelotti's time here, however, as he was one of our best players when performing at his peak. I reckon he could still be a decent striker, whether for us or someone else.