I hear a lot of folk say this especially man United fans, I guess because they watch him enough.
My guess is he has no elite level technical ability; be that ball manipulation, variety and weight of pass and to a lesser extent football IQ....but he does have vision just not the execution perhaps necessarily desired.
He's no iniesta, xavi, pirlo, modric, Gerrard, scholes....
He's not even xabi Alonso, fabregas, t.kroos either
What he appears to be best at is the late runs into the box like Lampard and doing Jorginho pens. But goals/assists influence outcomes of games, so he does have at any given moment the chance to shine.
A poor man's KDB it seems, talismanic without the full repertoire!