Before revision:  However, the resulting PM suffers from important over-fitting effects: many couplings are small, noisy and hardly interpretable , and the PM is close to a critical point, meaning that it is highly sensitive to small parameter perturbations.
After revision:  However, the resulting PM suffers from important over-fitting effects: many couplings are small, noisy and hardly interpretable ; the PM is close to a critical point, meaning that it is highly sensitive to small parameter perturbations.