I didn't say it's bad design because it's hard. I said it's bad design because it places artificial limitations on character progression. These limitations doesn't make the game any more interesting to play. You're still doing the same thing you'd be doing in non-Reboot, just less of it. The devs favor non-Reboot because cubes bring in a bigger profit than aesthetics so it makes sense to allow non-Reboot to go further from a business perspective, but from a gameplay design perspective, it accomplishes nothing and only hinders players' progress after they get to endgame content.
I'd also argue that Reboot isn't hard. Progression in Reboot is much, MUCH faster than in non-Reboot for free players. Increasing monster HP doesn't make the server more difficult, it doesn't require any more skill to beat them, it just means monsters take a longer time to die. It only serves as a waste of time that eventually becomes completely inconsequential, anyway, because you can get much stronger at a much faster pace than in non-Reboot and outpace monsters' HP. Difficulty is not the issue here. The problem is that your progression plateaus much faster than in non-Reboot so, after a certain point late into the game, you just can't do anything more. Once you've perfected your equipment, you still don't have the raw numbers to beat the final boss because the game took away your ability to progress.
That's a fair point but there's more than one way to balance a game. You don't have to make everything the same. I love not having to worry about scrolls, but I do still have to acknowledge that Reboot's damage ceiling is significantly lower than on non-Reboot and the beginner skill isn't nearly strong enough to cover that huge difference. That might have been intentional to make non-Reboot more appealing to paying customers. That's fine but no one who plays this game has to agree that it's good design. The draw of Reboot is that it rewards time investment over monetary investment. You can still balance the game around that to lower that damage discrepancy. Something like adding Reboot-exclusive dailies or even full questlines that increase your stats is one example. I'm not expecting anything like that to happen because it's more profitable to work on non-Reboot content but I can still complain about it.