Delboy,
You mention a mesh being used, where did you see this? I know that Hull City's surface has a type of mesh covering woven into the soil which protects the grass (they ground share with a rugby team) but I didn't know we were fitting something similar. If it works for them then I'd think it will do the trick for us.
Another thing I heard last week was that during the summer grass grows upwards and during the winter is when the roots of the grass grow down into the soil but if you use USH and heat the soil the grass thinks its summer and tends to grow upwards meaning that you have shallow roots, the soil becomes loose and is easy torn. Best advice is to turn off the USH straight after a game and leave it off until a day or two before the park is used again. If that makes sense