Eriksen is one of the most creative players in the history of the EPL. I don't see Enzo ever having as many goals or assists as him. He's more Jorginho than Eriksen to me.
Over 213 appearances Jorginho 29 goals and assisted another 8. Of the 29 goals a whopping 27 were penalties so discounting the penos he only had 10 goal contributions over 4,5 seasons for us.
Being a lot more defensive-minded player than Eriksen is, chances are Enzo will never get the same numbers as him (Eriksen averages a goal or assist every two games in the PL) but his output sure as feck needs to be a lot more than Jorginho ever had for us. So far the sample size is still quite small but Enzo certainly seems to shoot a lot more than Jorginho and has also tries to play line-breaking passes more frequently as well.
Starting from next season I would think around 10 open play goal contributions (G+A) over a season should be a realistic expectation for Enzo. Scoring or assisting goals is not his main job so if he can otherwise play at a similar level as Jorginho did, while also contributing more towards goalscoring he'll be a great player for us.