We would never know that, what we know is that they could barely get a win against Dortmund in the CL final, where BVB were the better side, and Dante should've seen red on BVB's penalty
They were really lucky to win their Pokal final as well if you had actually watched the match.
Hold on a sec, where does this top 6 myth come from? There used to be a top 4, and that was really pushing it. United and to some extent Chelsea and Arsenal have regressed for sure, but then again Arsenal -bar a year or two- were almost always disqualified once they met an actual contender, on the other hand Pool and Juve are as good as ever, Bayern are more or less the same, PSG and City might not be contenders yet, but they're still better than the likes of Lyon etc. in yesteryears, but most importantly Atleti were up there with some of the most solid sides you'd ever find, they won a fecking La Liga and had Real not won against them, they'd have at least two, maybe more CLs, iirc in 4 years they didn't once disqualify against any side not named Real, they won Barca x2, Bayern etc.
Lyon were a very good CL side, which you should know given they repeatedly knocked you guys out and were unlucky not to win a CL in their pomp imo. Better side than PSG currently is in Europe, for sure.