There is no issue with having a super simple mastery option, but people are arguing whether flex is at all worth it. If for example flex was:Lets not insult people's intelligence over this; that's just gatekeeping. Flex is designed to appeal to people who want to shut off their brain and just smash things. Which is valid. Don't like it? Then don't take Flex. Its not meant for you, its meant for others.
"Gain the versatile damage of the weapon at all times, and a +1 to damage".... its still just as simple but now has more power. So simplicity alone is not a valid rationale if flex truly is "weak".
Right now flex takes the 4.95 average longsword damage (assuming basic crit on a 20) to about 6.05, so effectively 1.1 damage. Is that "enough" to justify it versus the others....I guess we will see what the surveys think.