The layout looks alright, but I suggest rather using vertically staggered columns instead of "standard" layout on each half. The keys will fall more naturally under the fingertips and you don't have to move your fingers / hand as much to hit more keys. I recommed a stagger from inside towards outside of 0.25 up (from G to F), 0.5 up (from F to D), 0.25 down (from D to S), 0.75 down (from S to A), 0.25 down (from A to Tab). Split 5TGB to the left, 6YHN to the right. I like the way you removed Caps Lock and shifted Esc and Tab down. Great for hitting with your pinkie.
With a split spacebar you can assign one side of it to shift. It saves a pinkie stretch when typing. Could make it switchable so in one mode space is left, shift is right and vice versa in the other mode or just be able to switch one of them between shift and space (since I assume you want space on left for gaming, but maybe on right for typing?). Also, make the spacebar "halves" 2.75x size so you can use standard right shift keycaps for them, larger sizes are hard to find.
You can use Fn to have a whole new layer of functions for each key, so I don't think you'll need those macro keys.
Tenting is terrible for gaming. You often have one hand on the mouse and need to use your other to hit any key on the keyboard.
Do you use arrows? I like them for gaming sometimes. I'd also work on putting the B on the left half.
I disagree... Tenting is great for gaming and any use of a keyboard.
If you are hitting keys on the right side of the keyboard with your left hand your keybinds are wrong. The only time you should be doing that is in the chat window and then you can take your hand off the mouse and type like normal.
I use my split keyboard as my primary gaming board and the tenting is nice, really helps keep tension out my wrist for long gaming sessions. I use a highish a palm rest to rest the "nub" of my palm on so I don't have to keep my hand raised the whole time.
