It’s like showing up to a knife fight with a bomb. Biggest problem I face is knowing whether your opponents have it or not. Until you know your opponent has it, countering the SwapIn is strictly luck based and the most effective Counter is your Health. Since it can one shot many dinosaurs with 1/2 - 2/3 health, many of them are in danger after just 1 attack. Having a faster dinosaur with 50% health or more most player’s are going to choose to attack their opponent as opposed to giving up an attack to trade out their half healthed dinosaur because the other player might have a DG2. Most of the time the fresh dinosaur coming in doesn’t have a strong enough hit to kill a fully healthed DG2 so the DG2 with its now lowered health is traded out. Now you are aware that your opponent has it but any dinosaurs you now use when they reach that danger health zone have to either be traded out, giving up attacks, or possibly dying on the next attack. This is why it either needs to have either a 2 turn lockdown OR only 1x damage OR cannot bypass armor/shields.
It also gives your opponent an advantage as you are trying to get to 3 kills before they get 2 kills without exposing they have it. Once the kill score is 2:2 in most cases they only need to get you to half health (if you aren’t already there) to SwapIn win. You could trade a half-healthed dinosaur for your remaining fully healthed dinosaur but you give up an attack and depending on what you got hit with after the trade, you may be vulnerable to that SwapIn killer again before you ever get to make another attack.
I don’t like using many of them, but I think the most effective dinosaurs against players that have it are other dinosaurs that have SIA so you aren’t giving up attacks/plays to swap out mid healthed dinosaurs.
It’s frustrating and infuriating to have this little gal used against you but until things change, it is what it is.
But it is so satisfying beating someone that relies on it.