I wonder if this will improve connection to South Korea as well. Browsing .de websites from here involves a trip around the world, Seoul - San Jose - New York - London - Frankfurt for an average ping of 300ms.
Increases in bandwidth aren't going to lower latency. This path may be slightly more direct than an alternate cable system, but as long as your going through the US, the connection will never be able to go bellow ~200ms between South Korea and Germany.