You see I disagree with this 100% on two counts. Firstly, I do believe he is a premiership player. Secondly, whilst we may or may not NEED him next season as a bit part player, as far as I'm concerned we definitely WANT him here, so that we can oversee and control his further development.
Apart from the occasional gash and crap shouts from the usual sources (which is a lot more than just a couple as an earlier poster claimed) the general opinion on here is that, whilst his overall game is okay and has improved, his end product is just not good enough. Well I've got some stats from a fantasy league site that would indicate that, whilst not up there with the very best, his figures are comparable with his peers in the premier league. This, and the fact that he played more minutes than any of our other strikers, in a team that finished up 8th, would point to the fact that he is actually a premiership standard player.
I imagine I could have chosen any fantasy league site and come up with pretty similar figures, but I chose one that simply awards points for goals scored and assists, ie end product. So nothing for just turning up or making 20 passes etc like some of them. He ended up with the joint 16th highest points from the 60 plus attackers who played premier league football last season. All the players who scored more points had played more games (DCL played 20) only Aubameyang had played less and he's a £50m+ player. His points tally would have been even higher had Rooney converted 2 of the penalties he won. No attacker had more assists than DCL, only Firmino and Son equalled his tally of 9.
Had he converted just 3 or 4 of the "sitters" he missed, he would have sat comfortably within the top 10 strikers for points scored. He's done this in a team that is statistically the worst in the league for creating chances and attempts on goal, and being played out of position on the wing for more than half of his games. Now I'm not suggesting for one moment he is one of the top 10 strikers in the premier league, but I'm not having it that he wouldn't be in competition for a place in any premier team outside of the top 6, which is what you are suggesting.