Lyon got a good score for themselves by beating Monaco. Although this defeat does not pose great risks for Monaco, it will still cause a 2 point difference between them if Lille wins the missing match. Lille has to beat Monaco in order to go to the Europa League. This win of Lyon made Lille fans happy.
I think anything could happen between now and by the end of the season, we could see Lille get the win for that extra game and then beat every other game and be fourth. It's possible and they could go to europa league as well and that would be very good. I know that it's not going to change much because lets face it if you are not ready for it, then conference league could be better for a team at that level.
Anyone who joins conference league, monaco or lille, would have a higher chance to win and that is what I am supporting right now. If they end up being fourth and go to europa, then not only they will face harder teams, but they will lose and come back home a lot quicker as well without earning any cups at all, so maybe conference is better for them.