As much as I'd love this, Optifine generally has very specific rules about adding their mod to a modpack or 3rd party launcher. We would need explicit permission from the optifine team to do so and honestly I haven't seen anyone get permission in the past :/
Another issue, in my experience, which specific version of Optifine works best for you is very computer dependent. Especially on 1.7 packs. That alone makes me think this would only cause a lot of client crash issues.