For the people of Saarbrucken and other large cities nearby, it would save them driving one hour to Luxembourg in order to fly to London. For English tourists, there is nothing special to see in Saarbrucken, but Dresden is a beautiful city and well worth a short-break there. I cannot open the link to OLT-Germany which mentions any plans to SEN, but if they want to start in the autumn, they should start advertising now, I would have thought. Fokker 100s?