I'm not arguing with you necessarily but if you left your 6lb .223 and took my (probably 8lb) 6mm arc with a 22" barrel launching 108gr bullets at 2700+, you'd kill more coyotes, and that 2lbs wouldn't bother you. If for no other reason than how flat it shoots and how well it slides through wind. I'm down on a 223 for these big calf eating eastern farm coyotes I'm currently hunting. I put blood in the snow twice last weekend with 64gr .223 bullets, but never recovered the animals. Definitely more fur friendly, but significantly less lethal.The Valki appears to be a flash in the pan.
No reason for it except in ARs and dragging a 10 pound all up AR to hunt Yotes a'int fun.
If you can call, a 223 is all you need and building a 6 pound 223 AR is easy.