Now that it is more difficult to acquire champions, sales should apply to IP prices
Seems fair.
Seems fair.
It has only been 2 days max. People haven't even settled into the new system yet so I don't think assumptions are useful.
Personally, I've saved a ton (21350 BE) on champs using the mystery permanent champ token thing, but your mileage may vary.
Riot already released the math behind BE gain, and it doesn't agree with what you're thinking here.