70 hours in, i cannot get most of the complaints. At all. UPDATED OP#2

Friendly fire in combat is different than beeing able to kill npcs in cities.

Maybe it was just because it was first Bioware game with Frostbite? Just a guess. Funny thing is, when Inqusition was released, everyone bitched about how boring it is, how it is ´ the end of Bioware or DA franchise blah blah blah (sounds familiar?)´ but suddenly, it is the best Bioware game for some people. I love Andromeda and I love Inqusition, but I would never compare them, because I learned to love and appreciate those games for what they are, not for what they are not. People didn ´ t even allow MEA to stand on its of feet and just blindly started to compare it with everything. If they learned to look at the game without prejudice, I bet everything would end up differently.

Havarl is incredibly beautiful planet. It has abundant fauna and flora, but just because its vault was malfunctioning and caused mutations and overgrowth in wildlife.
Other vaults ´ malfunctions caused planets to slowly die and wither. And which lifeforms tend to live and thrive in harsh conditions? Fungi (like on Kadara or elsewhere) and bugs with hard carapaces. And krogan. But again, that ´ s just my guess and impression.

P.S.: Sadly, I don ´ t have biotic abilities in real life. It would be cool though. That ´ s why I play games.

No, it isn't. You're facing the same challenges in cities off and on. There's the possibility of you getting attacked there. Better make sure to aim at your attackers and not at the guards coming to help you or the merchant, who just picked up his gun to take care of the problem also. It's a reactive environment, after all. There's no such thing as your inquisition soldiers just standing there as if nothing happened while you get attacked in the middle of your camp in DAI.

Wot? It's a game, bro.

Okay, bro.

Ι play on ps4pro on a 4k tv with HDR mind you (the draw distance is very bad in this game), yes it looks good and sometimes it is quite the looker but it does not have that wow factor. I LOVED inquisition from the first time i inserted the disc. Inquisition for me is one hell of a looker and level i prefer its look than even witcher's . Havarl was great mostly to not beeing a drivable planet i think hnce the various platforimg sections and the memorable canyon.

I don't think this problem is specifically tied to the 'kill 'em all' option: TW3 has 'immortal NPC' too but I remember I visited a location once and I triggered a quest just by exploring. Later in the game I found the questgiver for that location and when I went there it was glitched (I had already finished it but after I talked with the guy it was reopened in my journal and I couldn't complete it)

It's obvious that the possibility to have NPC killed (either by accident or on purpose) increases the chances to break something but I still think that it's more a matter of quest design and then of QA department which must test every option to be sure that if a quest is composed by 'x' checkpoints the player  can complete it no matter what order he hit them. Perhaps it should be better to prevent certain areas from being visited before some quest is triggered but I know that it's not possible, because in that case it would clash with the "open world" concept. So it's always up to the player that must be able to balance the "freedom of exploration" with the ability to not break something by "sensing" that it's better to leave a NPC alone or to visit a specif area later. 

And this is why I always prefer games with self-contained areas: they are far less stressful to play.