Yea, you can change the BCLK, but that's not easy, not normally advised and gives only a slight boost anyway. Don't assume you need to watercool though; on Intel's latest chips up to around 4.2GHz is fine with just air. I guess you'll have to just wait and hope for any physics optimisation the devs can manage. In the meantime, efficiency of launch vehicles and orbital construction are the only ways to reduce the size of the massive launch systems that cause you so much lag.