Originally Posted by RiotChris
What pattern would you like to see? We're always open to constructive feedback.
We listen to player feedback on Champions to make free, and we introduce new Champions on a regular basis. Those two factors make it hard to have a set rotation that repeats every 8 weeks or so (which is I assume what you're implying about a pattern).
There are many good, expensive champions. However, these are rarely free. At most we usually see maybe two per week.
For those of us that want to test them before buying them, we are left with little choice, and if we dislike them, that is a huge loss of IP.
On the other hand, the most frequent champions on the list are low-IP. If we buy one and don't like them, there is little loss, because we can easily regain that lost IP in just a few games.
Therefore, the cheap champions (450 especially) DO NOT need to be made available as often, because they are easy to obtain anyway. We need more 3150/4800/6300 Champions to be available, because they are the ones that require investment, and we don't want to invest without being able to test them out first.
(Honestly, the price tiers just need to be changed and made closer together or removed. The difference is too dramatic. Many 450 Champions are perfectly viable for high-skill play, and plenty of 3150 or 6300 Champions are easy to use.
For the price of one 6300 Champion, I could unlock fourteen 450 Champions.)