I have to disagree with this. There are already online tournaments with many different speeds, so each player can just choose though, that suits them best. And not everyone wants to play or have time for tournaments, that last 6-8 hours or more.
I agree. I would love to see sites cap the rake at something reasonable like 3-4% for cash games, 8-9% for regular speed tournaments and 4-5% for hyperturbo formats. The income lost from this lower rake could be recouped by cutting down on rakeback, promotions and freerolls. Or in some cases there might not even be any loss of income at all, since people would play more, if the rake was reasonable.
Most online sites have that rule already. The only exception, I have heard of, is PartyPoker.
A showdown only happen, if two or more players are still in the hand, when all 5 cards are dealt and the betting completed. In that situation the player putting in the last aggression need to show first, and in most live poker rooms as well as PartyPoker other players can then choose to muck their cards rather than show a losing hand.
So this rule does not force anyone to show a bluff, unless the bluff is called. Which is already a rule in all poker rooms, as far as I know. I guess, in live poker its often accepted, that the last aggressor muck their cards, if they were bluffing and think, they can not win the hand. But the player calling can demand to see the mucked cards, if he want to "play by strict rules".