This system is definitely more interesting, because the teams that qualify for the quarterfinals will be drawn again and thus, no one really knows which team they will face next. But ya,regarding Bayern Munich in this round of 16 I think it is clear, that Bayern Munich will probably easily win too. Because ya, considering the opponent to be faced in this round of 16 is Lazio and ya, at least Lazio in this season also does not really have good results in Serie A, Because Lazio very different from last season.
Anyway, Bayern Munich clearly has better quality than Lazio because ya, Bayern Munich is always in and plays in the Champion League every season. Therefore, Bayern Munich certainly has better quality and mentality than Lazio and thus, it might be easy for Bayern Munich to beat Lazio later.
I would say that its "almost" easy for them to meet everyone aside from a few teams. I mean it's football and anyone can lose to anyone in the football world, but aside from Madrid and City, I do not see any team that could be better on paper than Bayern to be fair. The thing is, if they lose to those two teams then I would say it was expected and not a shocker, but if they lose to anyone else, it would be a shock, but not unheard of in the world of football neither, that's why there isn't anything that we need to consider. I believe they will definitely go to quarter finals, and when you are in the quarter finals you are right that anyone can meet anyone, that means very big clubs could meet each other. I still wish for a City vs Madrid finals though.