I remember raking couch into rows with a acrobat rake and then baling with a small square Baler to try and get rid of the bulk of couchI farmed before glyphosate twitch couch scotch grass, whatever was the local name, was and still would be your main concern.
The price they could charge originally was because of the amazing control it had on this weed. My first 5litres cost £51.00 and was recommended at 4l/ha. it would have been late 70 s I think.
So good that perhaps as a twenty odd year old you have never seen it.
It grows from rhizomes and I believe would love the system you describe above.
PLoughing did not work either unless it was just before a frost, it was a real nightmare and will come back if glyphosate goes.
Instead of an outright ban perhaps they should put the price back up to the early days and then it could still be used occasionally. A tax even?
Your system could work well with one glyphosate every 5/10 years but I think would soon struggle without it altogether.