It's not "losing land", IIRC Savoy was an independent dukedom whose official "protecting power" under the post-1815 European structure was Switzerland - until the 1860s. At this time when the french Savoy line died out, France forced a referendum on the Savoyards which was apparently significantly less free and fair than the 2014 Crimea referendum, and a majority voted or "voted" for reunification with France (the other options were staying independent or joining Switzerland). If the referendum were to go the otehr way Savoy may have joined Switzerland.
Edit: As to Alsace/Lorraine and Saarland, the former may have become independent as a result of the Franko-Prussian war of 1870 ending up in more of a stalemate with only slight upper hand to the Germans, so that France may have had a better negotiation position at the end - in which case it would make sure that A-L is not entirely incorporated into Germany but is a separate country, or maybe as a German "protected territory". Or maybe Bismarck had a change of mind and decided that an "independent" but German-aligned A-L may be a better outcome for Germany than outright annexation.
However, Saarland has never had any sort of separate identity, never mind sovereignty, before the 20th century, and it's only reason to exist as a separate entity was the coal and steel industry located there. A map that has Alsace-Lorraine as a practical buffer state between Germany and France would not have any reason to have Saarland be anything but a part of the Prussian Rhineland province.