P is offering some solid advice here. The benefit of doing what he suggests over more traditional linear periodization is a lesser deterioration of the biomotor abilities you aren't emphasizing.
yea....i try and steer away from just training one quality (linear periodization), especially in sports where several qualities (like football) are needed in order to be successful.
I wish I could be more specific, but I know nothing about you. One thing I would say about your trainign split is:
in phase 1: think about maybe training 3x's a week and working on your conditioning on inbetween days....as well, work on anything that needs big help (movement problems/strength deficits)....if you read my blog over the next few entries I am going to talk about circuit training and adding it to a program to help increase your benefits; by using it as "extra workouts" during the week and focusing on those important areas that need to get work.
in the transition, maintain that 3x's a week, drop the volume and up the intensity a little.
in phase 2 (the strength phase) up the inensity a little and volume of strength work but still maintain work capcity stuff as well.
In phases 1-2 plyos should be low level and also include plyos that work primarily on deceleratation, in order to prepare you for more intense work to come.
In phase 3: I would go with more concentrated loading (the west-side BB split is actually a good split to use ideas from....but, change some things as you are not trainign for a powerlifting meet).
in phase 4 (power emphasis) I would drop training to very low volume of strength work2-3x's a week and focus mainly on power work and sports specific drills. This is your time to really get your ass ready for pre-season. Strenght work can be low volume and i also like using complexes here, for example 1a) back squat for 1-3 reps; rest 3min; 1b) broad jump for 8 reps; rest 3min. repeat as you work a strength/power continuum. You don't have to do this at all, but I find it to be effective sometimes.
hope that gives you some more food for thought.