Personally i don' t think they are "visible" enough. Sometimes i do not even get that a champion is on a chroma, mostly if it is an enemy.
I can agree with that. As I've mentioned above, I think some champions are better suited for chromas. For example, Nami and Lucian I feel are solid candidates for chromas - they stand out pretty well.
Currently, we only have the chromas pack name in the loading screen, but perhaps considering more flair could make it a bit more apparent, and would be a better way to show off your chromas.
But i know in my little that is not that easy given what you said; that particles can' t be changed in colour at will, doing so merely skips a part of the design process if i guessed right?
Right, chromas are simply texture changes, so they don't go through the full development process, but creating a chromas pack for every champion by the end of the year, for example, would bottleneck for for our 3D modelers.
Plus the whole pricing stuff that might not be up to players desire.
Chromas are meant to be alternative choices for players who just want a champion or skin in a different color, and they don't feel the need to purchase something with bells and whistles. It's also why we have higher tier skins with all kinds of stuff in them - some players really enjoy it. That's why we have all sorts of price tiers that contain all kinds of content - our player base is pretty diverse in the kinds of content they like, both in terms of what goes into a skin, but also the thematic overall.