Lucas is great squad player. Great sub.
Great sub for what?
He can't help break down a parked bus, is not good at creating offense, loses the ball way too easily and more often than not gets in the way of Kane and Son than works with them.
If we are tied or the losing he is a terrible option to bring on. If we are up a goal he really isn't that strong defensively that you want to bring him on either and a worse option than Lamela who can be used to press the other team up front alone, as well as commit the cheap professional fouls.
He isn't good moving inside to a CM position, has shown to be poor as a striker (yes I know he once scored 3 goals in a game), so really can only play on the outside.
He offers so little off the bench and nothing that other better players don't already offer us. We would be much better by having a creative player in that spot off the bench, something we currently don't have no matter how much people want to think Alli can fill that role.