The common thread between all the previous regimes you mention is Ralph Wilson. He was directly involved in the earlier ones, and his Mini-Me stooge was involved in the later ones. This is the first regime where the stench of Ralph has been removed. The proven chump of a GM has been thrown to the curb, and the Mini-Me stooge has been rendered irrelevant. Without these changes, It was impossible to turn the team around as long as Ralph's trash still ran the football side of the front office, failure was far too strong and deep. Now there is hope. If the new regime cant get things done after 3 years, then yeah, it would be a mistake to keep them any longer. But by no means at all was it a mistake to finally clean house this year, the moves were long, LONG overdue.
KEEP HOPE ALIVE!