I might be mistaken but I thought that was what LW originally had. Yes I think that's quite a reasonable request. Though LW do try to get people upgrading ASAP for a reason. And that's for the users to mature along with the gnutella network as it progresses thru changes. Using older versions can be damaging to the network .. so they try to keep people aware of updates immediately. But then update notices is basically the same concept I guess ... just done in a different manner.
I did misunderstood what you originally meant.