Don't make "pay to lose" skins
By now everyone knows the expression for "pay to win" skins. Skins where the animations or skills are difficult to see or distinguish from each other. Two examples that came up/come up are Project: Ashe on release between her ultimate and her hawkshot, and Elemental Lux Q. I am sure there are more and will be more and hopefully they will be fixed accordingly.
Now on topic: "Pay to lose" skins. I love Veigar and wanted to test his Omega Squad skin on PBE. The skin is beautiful, the voice is funny under the mask and the effects are terrific and totally fit the theme. However, the W is extremely easy to see, regardless of the chaos on screen in comparison to his base skins. The W on the omega squad skin is a red target outline, where there's hardly any red on the maps at all it is high contrast and impossible to miss. The original skins are a very dark grey cloud. Now you probably notice this completely fine 1v1 in lane, but in ARAM or a team fight its much harder to see.
As I said I appreciate the theme and the art, however I'm not going to handicap myself by making my skills easier to see to the enemy, and therefore glad I tested this skin on PBE and wont buy it on live.
Please dont make beautiful skins that put you at a disadvantage (even if its slight) by making the skills or animations EASIER for the enemy to spot or react in the same way that you wouldnt give an advantage for using a skin.