Honestly, other than True Strike which is absolutely a Newbie trap in the PnP and here and has dubious use with only certain circumstances favoring it, the rest are the fault of the game either having homebrew that muddles the chance to hit or be hit, and likely needing to convey certain concepts better. As someone who plays D&D a bunch, things like the Ability Scores and and Attributes made sense to me and I read them clearly, but someone not familiar with the systems likely would need more explanation in a much clearer fashion.
True, we don't have tooltips in the game yet, or a codex, or anything that really helps new players much or a glossary that trains new players in D&D concepts.
I learned half of these things through trial and error and the other half through playing with other people in Multiplayer. I ended up buying the PHB and devouring it as well.
But Larian provided a challenging experience with some serious depth and I was like "Yes please!" 10/10 would buy again.