I switched to the 'Slick' theme on PC when it first released. It's ok. Feels less phpBB but meh, i'm usually posting from my phone anyway.
on mobile it's horrid. Scroll (or swipe whatever) down to the bottom where it says 'slick' and change back to mobile.
IS it Chief, the greatest Admin in history trying to make people use the VastBladder app instead (which is ok i suppose)