I do not believe they are technically capable of making a separate animation for combo and reaction-trigger, or at least they consider it needlessly wasted effort as it is much simpler to have both on the same animation.
Regardless, I still am unsure wether blinking or solid is better, but I would in fact prefer a blue color to a pink, because pink as it is now meshes way too well with the large amount of reds and browns in the WS buttons.