The only thing that should please the fans of Barcelona is that they are in the first pot and, firstly, they will receive a couple of weak opponents (with a high probability) and, secondly, they will not play in the group stage with Bayern

Otherwise, nothing has changed and not only English clubs will be a great danger to Barcelona - in fact even average teams will have a chance to knock it out.
This your statistics of Barcelona is really will not be encouraging to their fans, the way you spelt down the whole team and have no believe in them of winning the champions league trophy or even going far in the league. If this all come to past, I’ll also say that the club has not really achieved anything and should go back and strategize again. But I doubt all these will happen in the next season.
Arsenal is still assembling the team into a formidable one, as we all know, and has not yet attained the status necessary to win the Champions League. They will eventually accomplish that, but it will take them a long year to get the chance to lift the champions league trophy. For this season and the upper one, they are going to place more of an emphasis on the premier league than the champions league.
Every team always wants to compete in the champions league competition because of the fame and fortune they’ll receive from there. If Arsenal eventually gets knocked out in the Champions league very early, they’ll be proud they got featured there for some time, it’s still better than not qualifying for the league at all. Even if Arsenal done stand as a good side for the champions league title, they won’t relent it want to be eliminated at the first stage. I hope they show a fierce battle like others will do when the champions league begins.