Transformer reinforcement

Technically and flavorfully, werewolves and other transformers are 2-in-1 creatures and at some point in the fight the same creature will be on the battlefield both in its Day and Night forms. That means that throughout a fight each transformer uses two out of three battlefield spots. It poses no problems when using 1 transformer + up to 1 non-transformer creature, it's kinda manageable with two transformers (a new reinforcement will wait in line for another Day form to flip sides) and disables reinforcements when you play 3 transformers or 2 transformers + up to 1 non-transformer creature.

My suggestion is to rework transformer reinforcement the same way it works with meld creatures: if you put Day creature while its Night counterpart is already on the board, just reinforce the Night creature.