Yeah, durability alone isn't enough to sour me on the game, especially when the game is mostly a blast so far.
There's a certain bullshit/fun ratio where i say enough is enough, and in case of Berwick Saga i would say it's 2:8 bullshit:fun ratio so far.
FE5 for example was 3:7, due to alot of Bullshit and surprises, even with a spoilerless guide, yet i still love the game XD
Parry and Iaido come to mind, as well