I am certainly not a coach, but if you are able to swim consistently breathing every 4 strokes then I do not think breathing bilateraly every three will increase your performance significantly.
I would keep up your current pattern and focus on other technical points. One quote that helped me a lot: either you breath in or you breath out, but you never hold your breath.
I say this because I have spent a lot of time trying to breath bilateraly, without significant results, where working on one goggle out breathing, body posture or core swimming really paid of.
I am also curious on the views of the other forum members: personally I feel bilateral breathing is overrated