Well, the most profound effect this update had in my area was that all the level 9 and level 10 gyms were smashed, and some went to other teams on a more permanent basis. I still can't grasp what the point was in terms of 'rebalancing' the gym battles. I get what they were saying, and yes we see some different creatures in gyms now, but the rewards for battling strategically are still negligible. Sheer power is still a valid option. So not much has changed in that respect, from my point of view.