Artagel maybe consider that the people who MADE these games in the first place played DnD.
Maybe consider that these are DnD games, in a DnD setting, following the DnD ruleset.
Thats what i keep saying: Make something in the spirit of the original, do what the Original Developers would have done if they had modern technology.

Be a fan of the idea that the original developers had, not the product that was, as all products are, limited.

but on your actual point: You can automate dice rolls, but you cannot automate inspiration, as inspiration is something the player has to willingly acitvate. Thats the point.
You can make ONE diceroll easier. Need a specific spell to end an encounter? Need to convince an NPC to be on your side?
Realy need to make that saving roll to survive a breath attack? Thats when you use that. If the game automatically rolled the next dice roll with advantage, then the entire system would be useless.
Why should the PC play the game itself? and the PC also doesnt play the game in Infinity engine games, the PC does the dicerolls, you still tell your dudes wehre to go and who to attack and what to cast. Any system that is ACTIVE in DnD is also ACTIVE in Infinity engine games.
The Engine only represents dicerolls and the DM.

Its good that Sven seems to share my sentiment: make what you want to make, dont be bound by what your publishers tell you.
Thats how you got good games, trying to constrain Developers will not get you good games, it will get you derivative drivel that tries to chase after the success of another.
Has there ever been a game that aped another and didnt innovate that surpassed the original?
The only one i can think of is League of Legends that surpassed DotA, but tell me, what MMO succeeded WoW while beeing a WoW clone?
What RTS suceeded Starcraft while beeing a starcraft clone? What fighting game outdid Streetfighter in beeing streetfighter?
you can only create good things by innovation.

Archaven its not a conspiracy. They stated their "true" intentions already.
Thats about the only thing we know

Lemernis Baldurs Gate also had MP; its not like having MP limits single player somehow.