My guess is that you've improved the article since you received the comments above.... as it seems pretty clear.
But the actual 4 part programme is not so easy to instantly get my head round. Partly because I cannot think in 'seconds per km' - as I'm a miles person.
If I decide to do it, then I could spend some times working it all out.- but if you're good at spreadsheets, you could create a nice little tool where people input their max & rest heart rates, and the target time for their next 5K race. As an output, the spreadsheet could give an actual schedule of training paces/times for each individual.
It would take you a few hours to do it - so that all depends on your own motivation for writing your blog/website.. but would save at least 30 minutes for each user and remove a big barrier for the uptake of your proposal (for me, I think it would take more than 30 mins to sit down and sort it all out).
I'm just coming off the back of a marathon, and looking to do something different for a while, so might have a go - although I might look to 10K first.
Cheers