Wow. Some of you guys are just a bunch of

This guy has made what a few people consider an error in his design. It is something that I doubt he will change, so why beat him up about it? Making a suggestion for "next time" or something is just feedback, but going on and on and on about it doesn't do anything but start arguments about a machine that you will probably NEVER play.
I think that there are other design details that seemed a bit overkill, but hey, it is his cabinet build and I don't know how to weld.
As for the player 3&4 deal. I can say, as someone with a 4 player control panel (designed and built in 2005 as my second cabinet, 1st 4-player layout) a lot of people making 4-player layouts, which weren't many at the time, did them angled. I don't think that they were all "15 post, 1st cabinet, newbies... It was something that "looked" to be correct at the time, and was sort of the "learning era" of the 4-panel build.
With that said, honestly, 3 & 4 player games really don't get played much at my house. Not because of the layout of the joystick/buttons, but the games just don't get selected. So it isn't even something that comes up very often, so I just left it and moved on. When we have people over at the house and some of them want to play a 4 player game, I usually will play #3 or #4 as I've become used to the angle. To date, only 1 person has said that they couldn't deal with the angled control. Add a couple more that probably never spoke up about it, mix in the fact that they don't get played too much anyway, and I am not concerned.
Let's let this guy enjoy his build, right, wrong, or indifferent... Now if he was building it for you or for sale, then it would be a different deal altogether.
Funny enough, you can buy a "professionally built" cabinet from some companies that have angeled #3 and #4 spots.
At least if someone wanted to "fix" it, it just takes the removal of any artwork on the panel, re-routering the joystick hole, turning the joys stick, and then putting the artwork back on. Buttons can stay at the angle, it is the joystick direction only that needs to be changed. For me, I would have to get my artwork remade again. Maybe someday...