Damn, that's a prodigious number of questions!
That'll keep you busy for a spell.
My book is coming along nicely.
I don't recommend constantly using 80% of 1RM. If you do, you'll neuro-muscular system will adapt very quickly. You would do well to alter your loading between 70-90% of 1RM with a myriad of set/rep schemes. That's why I wrote the Set/Rep Bible.
When you hit 10x5, you should switch to a different set of parameters. But, if you really want to continue with 10x3, then yes, you need to increase the load and repeat.
Starr's program was good, but it's a little dated, at this point. I suggest greater alterations throughout the week with regard to parameters.
Sure, the 10x3/EDT combo you suggested sounds sufficient for progress.