Thanks all. Maybe I wasn't clear enough, my question was if adding commuting time to training time would do any harm, as cvskates wrote. I could use 3 commuting days as recovery days, but I'd like to keep hard days apart.
I'm not totally sure about this plan. It was recommended to me but I could change it. My previous training wasn't as structured as this one. Do you think it'd be better to skip th Z3 workout and do more Z2 instead? As I said, I have a good base, used to ride about 15000kms a year and though I ride less now, still is 10000kms a year at least, and can ride a slow century no problems.