Niantic just announced yesterday after the new capture bonuses that they would also be tweaking Gym training for trainers of all levels. The improvements just keeps coming!
Trainers,
As we continue to make improvements to Pokémon GO, we have made an enhancement to the Gym experience for…
Posted by Pokémon GO on Thursday, October 6, 2016
When training at a friendly Gym, you’ll be able to bring six Pokémon instead of just one to battle. Also, the CP of the Pokémon you’re training against will be temporarily lowered to match your Pokémon’s capabilities. This would make Gym training much easier, and better for those who were discouraged fighting impossible battles.
Hopefully these updates will bring back more of the players, and we are anticipating more features to be added in the future. Glad to see Niantic making improvements! Keep an eye out for the updates, they should be coming real soon.