Lausanne was too pro-Turkish, IMHO. While the Turkish border with Greece seems fair, Turkey got a lot of territories in the east where Armenians, Kurds, or a combination of these two groups made up the majority of the population:
https://en.wikipedia.org/wiki/Six_vilayets
Were Armenians still the majority anywhere in Turkey after 1915?
Anyway, it doesn't really affect my main point. In the near-century since Lausanne, Turkey has had no wars, or even serious rebellions, save for one little spat in Cyprus (which had little or nothing to do with the Lausanne peace terms). In short, Lausanne worked. Ok, there've been occasional riots and even assassinations, but by Mideast standards it has been virtually complete peace.
I'm sorry if Armenians and Kurds feel hard done by, but a peace treaty is not an exercise in abstract justice. Its purpose is to give all the principals - in this case Turkey and the Entente - a deal which they can live with and not feel the need to go to war again. Lausanne has passed this test. Versailles failed.