I don't know much on Yakimov, but Khaira has always been a huge project. You should check out his thread, where some people (including me!
) track his development. He's come a long, long way from being a decent BCHLer and added all sorts of dimensions to his game while improving his overall physical ability. The guy has huge determination and continues to meet bars being set for him, but he's still not there yet and will likely need a couple years in the AHL with that same determination and motivation. I really think he'll become a serviceable player.
LD isn't Khaira. He's been tenfold better than him at every level of development, which is ok. Khaira has been doing a good job catching up, but he'll probably never have the skill or physical ability LD has. If Draisaitl is ready, you don't send him back on principle. That'd be like sending back Hall, Stamkos etc because third rounder X benefited from a few more years.
You're ready when you're ready, and every development path is different. Some guys genuinely don't need more time. Let's wait until the camp is done to decide on Draisaitl!