That's it in all its glory, just make it where the cosmetic is cosmetic, loadout is loadout, perks give a selectable cosmetic piece and stat change rather than an armour piece giving a stat change.

Yeah, same idea, it'd be neat if certain things could be disabled or overridden, hence me bringing up perk cosmetic, where you could have two, three cosmetic choices from the perk, but then you could set it to be your "default" armour (what you customized).

I more like if they simply make the apperance and skills in two different system,so you can chose what ever apperance you want dont need to think about the skills

I get it, just an idea because skills, again from what I understand, will have an effect and with chaos it is already planned/intended to have a cosmetic effect as well, but it'd be neat to see it with the others factions as well, of course this'd be later on as there are a variety of options of how to go about this, sub-faction, classes, other factors(gods of chaos, Orks, and Eldar....though the latter would be interesting).

More choice would be good but maybe let palyer to make their unipe appearance is the best.

Hence...

...well, first time quoting myself.

I would very much like for Armor types to have different stats, with cosmetic variants for these armor types. The lore already has differences for Marks of Astartes Armors anyways, I say make use of it as I like when pre-battle choices have weight, I think it would add layers of strategy, immersion, flavor to the game by adding a bit more MMO to our Third Person Gorefest.

I would be dissapointed if the specific flavor of each power armor mark would not be represented with at least small stat changes...
And I assume also Eldar have differently crafted armors, probably lorewise they would be all personalized in one way or the other by Bonesingers or what ever powers produces/shape Eldar armor