The complex rule issue for tourneys is interesting. In my experience the way games are typically set up, the deep rule aspects do NOT come into play. What is important is knowing a few key, safe, efficient scoring strategies and being able to execute them under the game setup.
Watch any number of twitch streams of tourneys. Look at the DTM scores of games in the quarterfinals, semifinals and final 4. (I like to screenshot these to remind myself of tournament reality versus what people post online about things they've accomplished at home).
Most of the time finals scores do not reflect blowing up games, reaching wizard modes or even getting that deep in the game.
It's knowing where the *upfront points* are and being skilled enough to earn them. The problem is when rules are not intuitive, and if a player has not been exposed to the game, they are not going to figure out too much the day of tourney.
