I use her as my main and I do just fine. If you can't do fine you aren't trying to use her like shes meant to be played.
The whole argument that this guy can't keep up with his targets to combo is a complete lie. If he can't keep up with his target I'd LOVE to see how he plays. Akali is designed to keep up with her target. Any fool with exhaust can shadow dance and keep up. Any fool with Shadow dance vs anyone not named SIGNED or MASTER YI can keep up with their target.
Akali is fine. Sure, Rylai's is nice, but the changes you are proposing actually NERF THE HELL out of her. Reducing the slow? Adding a DASH to MOTA? Are you serious? She doesn't need 2 dash abilities. AT ALL. She does more burst on a single target than most non-mage champions and has excellent mobility.
The last thing she needs is another dash and more cooldown on her ult.
THE ONLY thing she needs is magic resist on W instead of armor.
well there's no polite way to say it nevermind.