This is all my opinion so many people might disagree with me. I personally hate the recolored skins.
First of all in the end i end up using the regular skin because it looks more natural. Secondly when i recieve the regular skin i want to play this champion and see how it looks but when i recieve a recolor i dont feel anything like that. In my opinion they also make the regular skin feel not so special. If anything they make me not wanting to play with the skin.
Instead of making 7 different recolors for each skin you can spend that time creating a new original skin. I'd be much happier if i recieve 5 original skins instead of 4 original skins and 28 recolors.
Thank you and have a great day.