Haven't seen Syndra, Karma, Draven, Cassiopeia in the last 8 weeks.
Come on. Especially the 3 which don't include Karma.
I insist.
If ^ makes a difference.
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Also, since its been said that Riot is open for suggestions,
I'd appreciate more expensive champions free more often, since they're the ones people would want to try before buying.
If someone finds any 450/1350 champions appealing, he/she would buy it and not regret it too much if they dislike it.
However, if someone buys a 3150+ champion and dislikes it, he/she will feel sad...very very sad.
My suggestion for 10 weekly champions:
3 champions would cost 6300ip
5 champions would cost 3150ip or 4800ip
2 champions would cost 1350ip
0 450 champions because honestly, people can just buy them.
The counter-argument would be "450ip champions have simple mechanics, easier for new players to play".
Well if that's the case, why not make all 450ip champions available to new players for the first 1-2 weeks after account creation?
TL;DR: More expensive champions should be free more often.