I think Lille is the one that is doing great this season and will do probably very good. The last game was against PSG and losing to PSG is nothing big deal, every team loses to them anyway, but Lille ended up with a win over the last two games before that.
There is a potential that they could do fine this season, I have seen them on UCL qualifiers too and they look like a very good team, it doesn't matter how we are dealing with this situation, it just looks like we are dealing with a team that is doing quite amazingly, and that's the most important part. I believe that betting on Lille could make some good profits, it would be a very good choice and I will do that for a few more weeks and see if they are actually as good as I think they are.
When talking about performance, there are many clubs that are better than Lille so far, they're Marseille, Nantes, Lens and Monaco. If we compare Lille's performance this season and last season, I saw they were much better last season, occupying fourth place in the standings. IDK how you can judge Lille this season, none of them have been able to impress me with their performances so far.