I absolutely love Workman. It's gorgeous. I spent months learning it, getting fast with it. I even got the supercool matrix style keyboard, I was so into it.
But now I use QWERTY, and I sold my matrix style keyboard. Why? 1. Using the standard is useful. Other people's computers use QWERTY. Terminals for typing things in airports use QWERTY. When you have to do first aid stuff on your system, you're not going to get to change the layout. 2. QWERTY actually isn't bad. Yes, the home row is largely wasted, but other than that, it's not as ludicrous as you've been reading. For evidence, look up who the fastest typists in the world are - plenty of them use QWERTY.
* if you think it's going to make you more efficient. If it's for fun, go for it. For me, it was worthwhile, because I got to forget QWERTY and re-learn with proper touch typing, not whatever 3-finger nonsense I was doing before.