The difficulty increase of 18.1% seems to have changed everything. We were going along pretty good until then. Is the only way to overcome that just adding hashing power? Would it take an 18.1% increase in miner hash to have stayed at the near 100% luck point?
edit: That would have been a 4.88PH/s increase needed just to stay current
The expected block is allways 100% no matter how much hash rate we have. Sometimes it will be less than 100% and sometimes it will be more but the expected is 100%. Adding hash rate only speeds up the process so we would reach 100% on a block much faster than we do now but the expected block find will still be 100% for each block.