Some degree of animation deformity is normal with submuscular or dual plane breast augmentation. Downsizing the implant won't get rid of the animation deformity entirely, but if and how much it would look less apparent is tough to say, especially without an exam and seeing the degree of deformity you have. Decreasing the size may make you feel like the skin is loose initially, but over time the skin envelope will shrink around the newer smaller size, so I would not expect that to be a problem given your preop photos and the fact that you did not go with a huge implant to begin with (which would have stretched your skin even more). It also looks like you may have an early capsule on one side in the photo, though photos can be distorted so again, an exam would be necessary to advise on that. If the animation truly bothers you, you could switch to a subglandular or subfascial location for the implant, although this would make the implants more palpable in general, since less tissue is between the implant and the skin. How palpable the implants are depends on how much breast tissue you have and how big the implant is. The larger the implant the more you will feel it, and the less of your own breast tissue you have, the more you will feel the implant (of any size).