Pathfinder Kingmaker has a very simple solution for the 15AC problem.
They have an option to boost your dice rolls in combat. It's the default setting. If you want to go hardcore then you can set the rolls to be realistic and whiff to your heart's content.
I mean - I hate Pathfinder Kingmaker's story, but they handled implementing the tabletop rules very well. It's an extremely mature take, they know that following the rules to the letter isn't a casual experience for a CRPG.
I aggree that Pathfinder Kingmaker stayed pretty close to the ruleset. But they managed to screw up when it came to encounters and the enemies the threw at you. Especially later in the game far too many enemies used touch AC targeting skills against you which rendered the typical heavy armored knight useless and made dex tank builds far stronger than they needed to be. The enemies were also far easier to hit with touch AC so that playing a kinesticist (DLC) for example made for a far easier playthrough. So just staying close to the rules wouldn't fix e.g. the encounters in BG3 (e.g. with 20 goblins at lvl 3/4) but it would be a step in the right direction.
