So early this year, Mumbai inaugurated the new international T2 terminal. At that point, it was unclear on what would happen to the Lufthansa Lounges in the old terminal. Soon, the news came out that there will be only one lounge that will be shared by all airlines.
This new lounge was inaugurated in late November & I did get the opportunity to visit the lounge on December 1.
My first impression was that this lounge is not as big as the Lufthansa Business Lounge in Frankfurt but evidently I'm wrong. There is more in this lounge that I probably did not notice. I'm posting two articles (courtesy Boardingarea) that might be helpful to Lufthansa frequent flyers. I was flying business, so had access pass to the lounge but I do not know if FTL or SEN members can access it when traveling on Y.
The Lufthansa lounges in old terminal are now closed. I never liked the old lounges anyways but this new one is worth a visit if you are flying via Mumbai (BOM).
Articles:
Mumbai T2 New Business Lounge - 1
Mumbai T2 New Business Lounge - 2
Conde Naste Traveller Review