I think instead of higher difficulty, it would be better to make the AI smarter.
But if they did try to make it harder, I would love them to make it Uber-hard, as in it's so hard that making Pacifist route would be better, making Char/Wis/Bard based character shine.
To be honest I don't know how they'd pull it off though, 5e isn't exactly complex that it allows enemy greater possibility to out hand your character. I think they just gonna make the enemy level higher than you a few level more.
When I see the video's, the PC alsways has the initiative in turn 1, during which he/she/it flies halfway around the world, hits 10 melée attacks for 50 HP damage each , casts aa few spells in addition to that and then ends the turn in a spot that cannot be reached by the few opponents that survived the round. Naturally he/she/it will succeed all save throws. Seeing this, I think that better AI for the bad guys is not going to be a solution. Perhaps the game should force some limitations in what items you are allowed to wear/use if the player cannot do this on his own. For instance, in my current PT, Shadowheart killed the nightsong and is now fanatically loyal to Shar. It would make no RP sense that I would swap her Shar equipment for something bigger and stronger. My bard Drow PC holds on to the Phalar Aluve and won't change that for anything in the world. Similarly, I don't want Jaheira or my bard PC look like Robocop, but retain a bit of bard and druid likeness. And so the fights are still quite difficult enough on standard level for me. (at lvl 11 in Ch. 3) But by all means, if an additional Armageddon difficulty level can make more players happy, then by all means do it. But would these players still be happy if they can't be Gods anymore but can only use 2 attacks per round, can't go over 24 AC, and do miss some attacks and save throws from time to time ?
Edit : The above may look like a plea to "play my tactics", but I didn't intend it that way. I give some examples just to clariofy the point, and the only ones I can give are from my experience naturally. It's not saying you should do these things to enjoy the game.
