I have taken aspects of both methods and married the two into one.

I am not comfortable with the CO2 levels that PPS uses. I feel it is way too low so have kept my CO2 levels at between 20-25ppm. (I tried 30 but angelfish stressed and yes i did have ample surface agitation. My CO2 is only on with lights.)
I agree this is probably the main reason for algae issues in PPS as well.

PO4 levels of 0.1ppm daily i also felt is rate limiting so i dose double the amount daily. This allows the ferts to all fall within your said daily parameters albeit at the lower end for PO4-being 0.2ppm daily.

EI requires regular water changes of 50% PREFERABLY ON A WEEKLY BASIS. As i stated on a previous post i have a 180g tank in my living room. I am not keen on automated plumbing as you suggested .
This tank used to be a cichlid tank and i religiuosly did 75% water changes weekly for 10 years! I've simply had eough.

I like PPS because with the leaner nutrients i should be able to get away with say 30% monthly water changes-light fish load.

If the above protocol of high light and moderatley high CO2 together with leaner nutrients dosed daily can give me good plant growth and no algae issues with monthly water changes , whom am i to complain?
I am more than happy with a 75% growth rate as opposed to a 100% growth rate that EI strives for.

Do you feel this modified approach will work? I have only been using it for one week after switching from EI . Any criticisms?

LAKA
LAKA