@Zellin
Advantage and Disadvantage
Good point about height actually making it harder to hit people below you, since they have smaller visible cross sections (~head and shoulders instead of full body) so that players standing up effectively look prone to your vantage point. Conversely, prone characters should be much easier to hit from height.
1.1: Maybe instead of Height giving Advantage to shooting, it
--a) extends the weapon's range and/or just doesn't give disadvantage to shooting outside the normal range
--b) doesn't give disadvantage to shooting prone characters
This solution is somewhere between what is currently implemented and your suggestions
1.2 Why do you say shooting upwards is different than downwards? Shouldn't the enemy's profile be the same either way? (In your diagram, the "difficult shot" should be equally difficult for the elevated guy shooting downwards or the ground-level guy shooting upwards, no?)
1.3 I agree with your "exception" listed here. Since "hide" is a bonus action, this suggestion would still allow backstabbing each turn, but it would actually cost some resource which would prevent also bonus action attacking, jump disengages, etc.
The other part to your suggestion-shouldn't get the backstab advantage against an enemy who attacked or was attacked by the same character in the previous round or this same round-is probably too convoluted of a mechanic. I think its best to stick with always-applicable mechanics, and not have general rules dependent on who you hit last round.
2. Possible Additions
I'm wary of adding additional sources of advantage/disadvantage. Your suggestions make logical sense, but would probably have too significant of an effect on game balance to make them worth the effort.
1.1.
a) It works that way even now, cause advantage removes disadvantage.
b) This may be a good addition, yes.
1.2. Notice this little bit "when the ground doesn't work as cover" - so if they implement covers properly, the impossible shot is still imposible, difficult is still difficult. But we have disadvantage now even for "normal shot". And then comes what I meant first of all talking about shooting downwards and upwards "from a medieval weapon". So happened that I have some real experience with bow and crossbow and I can tell for sure that shooting upwards causes much less trouble then shooting downwards from human physiology and the weapon construction point of view. When you're shooting downwards your own body becomes an obstacle; pulling the string on a bow is a bit harder, when you're pointing the bow downwards…
1.3. That shouldn't be to convoluted for programming. And for a player… welp, depends on the player and how they show it to him. Again I'm trying not to remove backstab entirely and in one of my previous posts I suggested to make hide "bonus action" only for rogues as in D&D 5E, so if they do that and will never allow backstabs aside from stealth, it's only rogues who would ever use backstabs. Maybe a bit harsh towards other classes.
2. That's quite possible. Either Larian will feel the same way, either we will have the opportunity to test it on practise.
