Personally I think it's a luxury problem to be able to worry about divot patterns on your "grass" hitting areas. Here in The Netherlands there aren't any grass practice areas (I should rephrase, I don't know of any offhand). Not at the private clubs and not at the public facilities. Even though I've been told they don't have the resources or can't afford to manage it I still don't get it. Every country around us seem to be able to offer it with the same weather conditions so basically that means they don't want to take the effort to re-sead and shift the hitting areas. I've also heard there are too many golfers to manage this. Don't believe that either, it's simple, charge extra for it if it's a public course. That will keep the people that don't know how to use it for the most part off and the rest who appreciate the value of practicing off grass on.
It's simple, IMO you guys are all lucky to be able to complain about it. Try hitting off hard mats all year round.