As a dedicated support player, I was very much looking forward to seeing the new ward skins, and got even more excited after the price - Thinking that was the price for permanent usage I actually got excited, but have no completely lost faith in the pricing team at Riot.
1. Non-permanent skins, even if they are holiday skins, are a BAD idea. And replying to all arguments that point in this direction by saying something silly like 'oh, but it's only for the holiday period' is ridiculous. That's like limiting usage of holiday champion skins to a certain time of the year. What the fudge.
2. Your explanation of usage is weak. Only after reading the forums I realised that not only are they not permanent, I cannot use them whenever I want. So if I wouldn't play LoL for a while to dedicate my time to studies, I would've wasted my money.
3. Your pricing. Is. Ridiculous. No further explanation is necessary. My fellow summoners have already stated the 10k IP it would cost to use the cheapest IP wards for a year.
I hope you'll reconsider making these permanently available - even if this would mean they were to be more expensive.