I liked Isabela. As crude as she can be, she does have some moral code - refusing to sell people into slavery, for example. And in my playthrough of DA2, I told her I didn't care if Castilion was after her, the relic was going back to the Arishok. Of course she ran off, but she also came back, and that scored big points for me. Also admitting I was right to kill Castilion after the fact... She can be much more reasonable if you don't put up with her when she's being selfish.
I can't say I actually liked Isabella. But then I played the rivalry and that was good. So while I was not fond of her personality, she was the only one whose friendship actually felt worth something on the rivalry path. She would acknowledge that you opposed her because you cared. When she approached me in the end to thank me, that was unexpected and really great. My feelings toward her improved just by seeing this. I bet if I had played her rivalry sooner I would think better of her overall.
That's incredibly exaggerated. This is just basic military protocol. People aren't going to be getting liquidated because Sera doesn't jump the gun and lets her commander handle a situation he or she came on foot to handle personally.
We do not know; that's the problem about everything. Do you really think people always expected all the atrocities committed in somebody's name? In life dubious things can turn out good or bad, you don't really know. But better you question once too often than once too less. If the Inquisitor had been possessed? Sera would have found out and, "Phew, that was close, good she dared do that." And if the Inquisitor was not possessed? In that case, no harm done. I prefer people to think for themselves instead of blindly following orders. To me that's bravery, even if others think subordination was better. It's just an individual, different point of view.
If you were in a military or police situation
Have you been in the military/police?