Did you forget so fast that Juventus found themselves back up already, it is very impressive how they have turned some game's around for the last six game's. It is not wise to compare Juventus and Arsenal they are not on the same level but different level.
Arsenal might still not win the Europa League just like you said making claims and conclusion of Arsenal winning the Competition is something I will not support. They have to do better.
There was impressive improvement in Juventus before the break and there was chance they will do good job in future as well, but suddenly things are going against them as we have some new investigation with all board members already resigned from their positions and look like we have no good news after this break for them which is surely not good even right now things are not cleared, but hopefully we will have all updates in coming days which will give clear situation about this all and hopefully things could be also not the worst for the club, and we will be able to have this club at his best, and they could be able to do good in UEFA Europa Cup as well with most chances they could be ended at good because competition is not easy for them in presence of many other big clubs.