Evolk

No experimenting needed here as far as I'm concerned. The split system perfectly serves the purpose and I thought, and still think that its duality is quite ingenious and unique. Splitting vitality into endurance and health also is an arguably better abstraction of reality than just a single health bar. There's nothing hard or difficult to understand about it as well. Deadfire just needs a similar "training ground" intro like the caravan encampment/Cilant Lis prologue in POE with (optional ofc) tutorials popping up accordingly at the appropriate time and place, and all should be well.

Here's hoping they'll actually sound like that this time.