On the one hand, a simple "stat number up / down" is a boring way to do difficulty, but on the other, I feel like my inability to focus on card game engines will stop me from accessing some content. However, I have access to Cheat Engine, which kinda balances that out if it comes to it.
This also stops the "I booted up a game on easy and the game ended before I got to do the thing I was trying to set up because the enemy has 80 HP" which is good.