Spurs sacking Pochettino and picking up Mourinho is universally seen as a sign of intent, to re-establish a winning mentality (individual games, not trophies that least).
Our sacking of the same manager they just picked up was a sign of his failure, apparently, to motivate these players. I agree with much of the OP, but I can't agree that it is Ole's fault they can't be arsed. It has been a long established fact that Jose - The Special One - couldn't get what was needed out of this group... how could Ole?
Simply put, it seems upper management thought sacking Mou and putting in Ole permanately (after some hard fought wins) was a sign of intent, that we'll re-establish ourselves within our ethos, and rescind our policy of in-and-out management. Despite the turmoil, I absolutely love this intention. I believe upper management is finally seeing the long term as a priority.
When a season goes this badly, it is hard to see past your nose into the long term. Whether or not Ole is the right man to bring us back to the top, who knows, but I am optimistic his tenure could be the beginnings of reversing post-SAF policies of short term, revenue minded leadership we've had for what seems like a decade now.