Bedroll use only when there's a fire place nearby)
Although you usually make a fire when you camp, I don't see how "bedroll use" and "fireplace" *must* go together. You're saying I can't throw down my bedroll in a corner of a house and get a decent sleep? Or what about the Lady Vengeance? I can't use bedroll and get sleep on the lower decks of the ship because there's no fireplace there? How is that realistic? Since apparently "realism" is your goal here, right?
Weapons and armor now loose durability during fight (1 fight = -5% durability)
Durability is rather irrelevant as it is right now, true. I'd still point out that it has nothing to do with "fight" though. It depends on how often you actually hit someone with your weapon, or how often you get hit. But I agree some changes to durability mechanics would be fine.
Save the game only on waypoint statues
You mean no manual save, no quick save? God no, just no. Horrible idea. Probably as bad as "level of gears sold in shop varies within 5 levels from yours". For a game like this one (and previous Divinity games too), when it is SO easy for things to go wrong, even when you have beat it and know exactly what to expect. There are still so many people reporting game-breaking bugs that are bizarre and seem totally random and prevent them from progressing. No matter how good you are at this game, you don't beat these bugs. They beat you. Wait until YOU run into one of these monsters and we'll see how much you enjoy this save restriction idea. At least in TES games you have an all-powerful console that lets you solve pretty much all problems in the world.
By "fast travel", you mean traveling using way points and the pyramids? As far as using way points is concerned, I see nothing wrong with it. Not being able to fast-travel from inside cave? But why not? It just doesn't make sense. This is unlike the fast-traveling in TES games where you can fast-travel pretty much anytime anywhere outdoor. Being able to fast-travel from indoor anytime would be a little bit too convenient, and it might also have something to do with the way world areas are loaded in those games. In D:OS2 you have to use a device, found at a few specific locations. It's totally legit. Why should it not work when it is put inside a cave? I can't understand how that is NOT restricted enough. As for the pyramids, from my point of view, they are a signature of the Divinity games, so messing with them is a very, very poor idea. I also find it funny that even though "realism" is the aim in the first place, we would keep coming up with ideas that are totally unrealistic and make no sense in order to make it more... uh... realistic?
Generally speaking though, I don't think the idea of a "survival mode" should even be "a thing". This is not an open world game where you control a single character. Survival mode makes sense in games like the new Fallouts or TES games; it gives you a stronger sense of living an alternate life. This is a top-down old-school party-based RPG. I suppose you can certainly implement a "survival" kind of mode for this game, but I'd wager that it won't feel nearly as good as in an open world game - it won't give you the same kind of sense.
