If we don't find the game fun due to the lack of auto-block, then it's basically the end of the franchise for us until auto-block is added back in. In other words, we can't enjoy a very core part of the game with this feature missing, enough to where it potentially ruins the experience of the game as a whole. Even if everything around it is great, if you come out of every engagement wildly frustrated, you won't consider it "fun".
The shield argument is very disappointing. I don't want to use a shield. I want to use a 2H weapon. And the obvious responses are either
a) Then use a 2H and get better at blocking, or
b) Then don't play
(b) is the end of the line, but for (a), my response is "that's not the experience I bought the game for". And finally, the usual response to that is "that's what devs intended, so deal. This isn't your game, it's theirs". And you'd be right to say so. However, all the same we can ask that it be changed.
There was an earlier post saying something like "You have shields, so you've lost literally no fun. It's still there". No it isn't. The fun I wanted was 2H, and it's not there. So I did, very much, lose it.