After a rest cycle Chris Carmichael advises taking one step back and not starting where you left off. His book is very interesting when it comes to training cycles/blocks

In rest week's I do only short, slow-paced recovery runs and 1 long run that's generally 2/3 of the distance of the long runs I'm up to. My rest week which follows a Sat long run are: Sun off, Mon Off, Tues Off, wed RR, Thurs RR, Fri LONG, Sat Off, Sun Off, next cycle begins on Mon

For normal training blocks I do one hard run (tempo, hills, interals, fartlek etc) and one long run per week. The rest is filler at 75% of my max hr. As I get closer to the race, I decrease mileage and add extra speed workouts.

The weekly outline you gave is basically what I follow as I progressed up from 5K's to a marathon in 2006 (over 5 1/2 month period) and ramped my milage up.

although I also did a medium LR on Wednesdays, about 2/3 - 3/4 the distance of my LR ... and my speed day was Tuesday and LT/tempos were on Thursdays ...

With sticking to 5ks I think keeping Wednesdays shorter would be alright but I'd seriously consider switching your rest day to Thursday and give yourself a little more time between your 2 faster workouts per week .... I'm personally doing that this time around ... speed on T and LT on F and easy Th and S with M cross-train or off.

When to start adding the speed and tempo workouts (intervals are much more appropriate for 5Ks) has a lot to do with when you are wanting to start racing. You should be adding the faster stuff in regularly about 12 weeks before optimal racing. I'd throw in striders at the end of some workouts as well.

I'm a huge fan of Pfitzinger and would highly recommend his books to anybody interested in improving their racing times.

Good luck.