I hesitate to use true custom themes as they have to be kept up to date. Since it's so easy to customize the colors of the default theme without changing any templates, I'd prefer to stick to that route. The current dark theme is just a color change for example.As far as red theme, I thought I found one a while ago that seemed to have generally positive feedback.
iPhone Safari "request desktop site" doesn't do anything I'll give Tapatalk a try again, last time I used it years ago, it was about as simplified as the current mobile layout which is what I'm trying to get away from.I'm on 3440x1440 and the extra space isn't too bad. Really it's just to prevent the lines from getting REALLY long.
Cleanup of the homepage is underway and uncompleted: https://forums.finalgear.com/threads/forum-reorganization-and-cleanup.3555458/
Yes, the theme is responsive so there isn't really a redirect that can be done. Most mobile browsers have an option to render the desktop view though instead with tiny text you zoom in on. Try that, or you might check out the Tapatalk app.