Don't take away Kindred's %hp on auto atacks!
Source: http://www.surrenderat20.net/2017/05/red-post-collection-dev-diary-on.html#more
I'm Kindred main, I play them from release, they are my favourite champion which I have most points on, I even cosplay them! Please do not force Kindred to build crd + AD, we already have enought of this in game. Please do not make them so spells reliant. Isn't that % current hp per auto what defines them? What differ Kindred from other champions?
With that changes you propose I feel like Marks will be completly neglected, getting them will be be "I either get one from gank or no, idc. Will not risk counterjungle for a Mark". Kindred will build full AD and be good, then you will nerf AD ratios and left Kindred unplayable even for current Kindred mains!
What I propose: make all the changes you offer, but without taking away %current HP on autos. That would let player decide if they want to build AD and deal dmg from spells and powerfull but slow autos OR stay with building AS and rely on Marks and autos. If that would make Kindred too strong, you can try changing % on stacks, AD ratios or the additional effects on spells from Mars you plan to add now. If that would still make Kindred too good or too weak do not be afraid to tell us "This rework was not a good idea" and rewert it. Do not Malzahar'd Kindred!