Even when that is true, i still have calculated 700k shares in that round, so i still have the right for my share.
Not true because your reward drops much faster if you stop mining. This is to prevent pool-hoping but I think it's working real good in operator's favor. I don't think the missing reward go to other miners, it goes to the owner.
Which also makes Slush useless for backup pool because if my pool goes down and my equipment switches to Slush for a bit, I will likely not finish a round before my main pool comes back online and miners switch back. So essentially mining for pool owner's new sports car.
The more I read this thread and lack of responsibility from Slush the more I hate Slush. Outright theft and most people are ok with that. I want that kind of blind loyalty.
Everything you wrote other than the first sentence is wrong. The entire payout (minus fees) is distributed to miners. The score for each miner is calculated, and then the reward is split.
The expected value of hashing on Slush's pool for 5 minutes twice a day for two weeks is exactly the same as hashing there for 140 minutes consecutively. The variance will be higher, but it's just as possible to catch the end of a block and earn way more than PPS for that 5 minutes of work as it is to not hit any and have low rewards.