The ability to buy instant reactivation vouchers for gold is causing problems. Certain folks either have more money than they know what to do with and buy an inordinate amount of gold, or have found a way to cheat and get free gold. Either way, they lay tons and tons of tracks to connect all over the map. Then they scour the map for competitions they want to win. The put their trains into the museum, then instantly reactivate them where the competition is. As soon as the competition is over, they do the reverse. They effectively teleport their trains all over Europe.
If you limit the instant reactivation to only those vouchers won by buying lottery tickets, that should lessen the situation.
Of course, if someone has figured out a way to get unlimited gold, that will always throw off the balance. I sure hope they like winning by cheating. It just disgusts the rests of us.