The issue:
With the last update the entire game is set to the standards of the new batch of slaves, rendering ALL glads, bought before that point obselete:
Not only will the old, once dominant, glads not stand a chance against the new batch, they've become useless in any other part of the game as well: My (HOL!!!) gladiators all of a sudden don't stand a glimmer of a chance in either the Gauntlet or Conquest where they did perfectly fine before. Since these two are ESSENTIAL to keeping the glads up-to-snuff this means they're renderred useless by the update.
I invested a lot of money in them and since I just got around to having my stable a full HOL-batch, I have no Spare HOL-slots left.
Also: The Old HOL-glads I have are still far from being able to retire.
We did NOT get any prior warning about this deliberate destruction of investments...

Suggested solution: (Temporarely) Drop the requirements to retire these old HOL-glads, so we can update our stables to the new standards and retain at least a modicum of our investments.