It takes such a long time to train pokemon to the required build, especially when you have none of the pokemon in the new team after the nerf.
I think it will be really helpful if the dev team can make the pumpkin boss fight like a duel between players, where their low-level pokemons get to the level set. By this, it saves a lot of time on level training, and ppl still have to train it to some level to evolve and learn moves.