Our bench is strong when everyone is fit. With Bayern we missed Chiellini, Caceres, Marchisio, Lemina and Dybala, and had a barely half fit Pereyra and Asamoah on the bench, so we were thin with options, especially at CM. Khedira also didn't have 90 minutes in his legs and it cost us.
In an ideal world a bench with Neto, Rugani, Caceres, Evra, Lichtsteiner, Lemina, Hernanes, Sturaro, Asamoah, Pereyra, Zaza and Morata is very good. You take out 6-7 players who can contribute to a game and you will feel it.
And yes I know Bayern had some injuries too, although they were all in the same area of the team.