This is a very silly argument. Video games are challenge spaces like any other type of economic game, individual or not. The success of these challenge spaces, as defined by their appeal to intellectual curiosity and mass consumption, has always been strongly correlated with balanced win conditions and/or game states for each distinct player or element of the game.
Also, Larian's latest RPGs featured PVP opportunities as critically important, story-driving gameplay, so I'm not really sure where this assumption is coming from.
You conveniently left out the part where 1) this is a team based game, so over all, team performance is what matters more than individual performance and 2) even though divinity 2 featured that mechanic, it was not a selling feature of the games at all, it was more like a side gimmick. This is not DOTA or League, its an RPG, which is primarily played cooperatively. The only way balance really plays into it here is in 2 places, the first is being "jealous of your neighbor," where you see someone else controlling a character and doing far more than you and you feel bad because of it. The second is balance against the AI. The 2nd can be dealt with by making the AI take advantage of these mechanics as well.
Don't get me wrong, I love tactical games, in fact, that is the part I like about RPGs the most, hard, tactical combat. The only other genres of games I play are RTS and TBS, the combat is what I like. I would rather have combat that is hard and somewhat unbalanced, but has more tactical depth, than combat which is hard, balanced, but lacks in terms of depth. Right now, the combat is not hard, in fact it is really easy, but it has potential in the depth department and if you invest enough into making the AI take advantage of surfaces it can provide an appropriate challenge.
5e as a system is not a deep, tactical system. For those of us who liked D&D because of its roots in war gaming, its a very shallow edition, which is why I would rather have depth added, even if it unbalances the system, then the system left as is.
