The "DM" should also generally keep an eye on game balance - and cater for those who care about core rule implementations. Rules provide structure and allow for game balance (and common sense) - lookup the definition of a game, and the rules are a core part of that.
Many, many people have asked for a RAW 5e implementation option (like Solasta showed can work). Many (all?) other computer D&D games have a 'core' setting. Just because some people are used to DMs who don't actually care about rules, doesn't mean that those of us who do enjoy carefully structured and balanced mechanics should simply be dismissed.
EA provided ample opportunity for issues to be pointed out with Larian's' interpretation of 5E - most of that was ignored...even though the game was meant be the 'definitive 5e' experience or some such quote from the early EA days. *I* bought into the EA on that basis, so while I enjoyed the game, there are mechanical aspects that make me roll my eyes in disbelief since they are exactly what I would expect a 13 year old DM to allow as being 'cool'. All this has been discussed to death in many threads.
