I don't expect a 3 goal advantage, or that the game will be easy. A 2-0 result will be excellent to me.
I know what we think won't affect the outcome of the game, but it annoys me a bit when I see people underestimating a team like Bayern, with a coach like Pep. Or thinking this is the 2013 tie with reversed roles. Their team is nowhere near the horrible state ours was back then, and ours is not as good as that bayern was.
A 2-0 result is beyond excellent. It almost ends the tie from the first game. We score one in Bavaria and they are done and dusted.
The 2-3 defeat vs City had Bayern play with 10 men, so we should not ascribe too much weight on that.
But overall, Bayern have not done well against good teams this season. Both in Germany and in Europe. We have been awesome against more and more formidable opponents, no two ways about it. This is the reason why I consider us as favorites.
But football always carries a heavy element of randomness. We can play awesome and fail to score (Celta or City at home, two games we should have scored a grand total of at least 10 goals in, we only scored one) and have Bayern score a Diego/Essien-esque lucky golazo and leave us leaking our wounds in the end.
Bayern may also manage to raise their game for this one, significantly. If they play like that have in big games this season, they are going down, and they are going down ugly, unless they get City/Celta levels of luck on their side.
So, I would say we are definitely favorites, but Bayern are nothing to be sniffed at and the element of luck is always there as well. So, we shall see.