Hope you have those duplicate heroes ready...

Korean patch notes say that each duplicate hero (level 1/40 6* needed) Ives you 2 additional levels. The new max level will be level 50 which means you need 5 duplicates. Personally I fed a lot of heroes because of the extremely small hero space we have especially when it came to Ultimate Enhance. Seems like a bit of big P2W aspect has been added more than any other update at least.