In the history of the uefa champions league, the most important thing a team must have to fight till the very end is experience and quality, and if you look at this arsenal side, they have the quality but they lack experience, that's where I think Bayern Munich would use to edge them of this quarter finals encounter.
If you look at arsenal performance in the past few games in the champions league, and especially against fc Porto, they were a bit shaky, I believe that, that is what lack of experience does, when in a major tournament like the uefa champions league, so I believe that their lack of experience will cost them this game against Bayern Munich, besides Bayern Munich is not a team to underate regardless of their performance recently.
I have to be agreed with your all review partially because things are never been gone on same way even there is no doubt currently we have Arsenal with lack of experience and mentality to win in big events but still their recent performance is impressive and Bayern Munich which is already out of the Bundesliga title race are having only one chance for the trophy is Champions League, so things are surely tough for the both sides and this is going to be challenging match between these two sides with advantage for the Bayern Munich.
But any prediction is not easy because we are well aware about the nature of the Champions League where things never been work on long base sometime we have match day performance and luck as well, so Arsenal is surely going to have chance for the win and jump into next round with this could be dream season for them after years here in Champions League.