While I admittedly haven't had the time to read each post in this thread, I just wanted to chime in and say that I'm not sure that making MSQ content easier in order to not exclude older players is a good thing. Why would someone in their late teens or early 20s want to play a game that was also designed to accommodate for the reaction times of someone significantly older? I do think that having a set target demographic in terms of age is a good thing, especially in terms of difficulty level.

Difficulty is also indeed capable of being measured objectively by way of damage output and attack speed/frequency. There should be a good balance of both in order to make sure that content is fun and engaging. Again, it is probably to the game's benefit to tailor these aspects around a young adult demographic while providing the necessary accessibility tools in order to account for disabled players within that age range (text size, color options, and so on).