I did have a friend (from another country) who played GW2 religiously, and now has had to stop because some of the professions were as she put it 'too flashy' she meant that the flashes caused by certain weapons and skills sometimes both set her epilepsy off, so as a result has now had to stop playing GW2 all together. (which is a shame)
Personally i think GW2 should implement some sort of adjustment mechanism into the game to reduce sufferers not wanting to play because they too suffer from either epilepsy or are extremely sensitive to light (which i suffer from, but i don't have epilepsy). I have Fibromyalgia, and one of the biggest symptoms is sensitivity to light.
Yes i do know you can turn down the graphics in the settings, but this does not solve the issues it makes the game vertually impossible to play for some.
And also give other players an option to utilize a colour correctness option for players who are colour blind too ( sorry for mentioing another game, it's for reference purposes) like Black Desert have a option to change the game graphics to suit players who have colour blindness problems, so they too can enjoy playing a game they love.
Implement some sort of adjustment so that it becomes more acceptable and be a more comfortable level for each player, please consider these thoughts/ideas for future gaming Anet and thank you for continuing to be my Favourite game π€©