I’m an avid believer in lifting after you sprint. I’m also not sure that you’re increasing the amount of high intensity sessions by splitting sprinting and weight sessions to different days. Furthermore, if you were to increase the amount of high intensity days it would prove detrimental in the long run. I wouldn’t try to deviate from Charlie’s system. Your CNS system has a greater capacity for work and it would be far more beneficial to get it done in one day. Sprinting, weights, and plyos in moderation could be performed without overloading your CNS. You will recover in about 2 days even though you will still feel soreness. Remember the goal of a successful workout session would be to work just under your CNS threshold to achieve the benefits of supercompensation.