+1
How great would it be, to see a big spike, around 200% on pool luck graph, that would look like, hmmm... Himalayas?

Would look like the spike on May 23rd @ 196%.
I was thinking the other day it would be nice if we could set performance notifications, like idle notifications. So If I have a 1000GH miner, I could set it to report if it falls below 920 for more than 30 minutes.
I had an S2 module turned off (100GH) for more than a week before I noticed it, due to the variation of other reported miner speeds.
You will have to make your own program to do this (its trivial with the API). The pool does not actually know your worker speeds, it only calculates them when requested (viewing dashboard/calling API).