Yes, I'm sure they'll figure it out it requires tracing the assembler and decompiling. However, Niantic are sooner or later going to twig that the best way to block these mappers is to more carefully look at the accounts in use. If they make it harder to create lots of accounts, if they tag accounts that jump around a lot, and tag accounts used constantly over hours and days, and tag IPs that are producing so much traffic concentrated on a subset of accounts, they'll easily be able to defeat mappers without further API obfuscation.