Time scales are important in mining. If you are looking at the daily, even weekly timescales, you'll be depressed A LOT. Bad stuff (long round) always takes longer than good stuff (short rounds)... so we can have the bad stuff for a good while, and still come out to 100% at the end after 10x diff increase. The pool has already done this.

If you really wants to reduce variance, use the invite feature and get other large miners to mine with us. The benefits of the pool are clear. Stability, no fee, best graphs and charts of any pool on the planet, and the operator keeps your coins as safe as possible, aka, backed up, never on a live server, cold storage, etc.