You're going to find with the trencher that your damage is more isolated (just the trench lines) but also more severe. I put ten zones in an acre (you must have really good pressure to do 2 acres with 9 zones!) and as I said earlier, the trenching went beautifully. It was also nice to work in the trenches with a little give and take that I don't think I'll have with pulled pipe. But I have a couple of spots in the yard where you can still see the trench lines 3 years later. I've topdressed and filled and pampered these areas 2 or 3 times a year and they just keep settling. Now no one else can see them, but I still can. Maybe next year.
That spring must be a pain.