Find the tsb for metripack "fretting" issue....its why the metripack GT series (these have purple plastic on the connector body) are silver plated....the tin flashed terminals accelerate fretting.
I've seen melted fuel pump module connectors on vehicles with less than 30000 miles. You do not make major changes to a whole production series of cars and vehicles to put in more expensive and nearly double the size terminals to fix an issue that is only found on out of warranty vehicles. Bean counters would only allow that kind of expenditure if it was a common issue on brand new vehicles under warranty which it was....