what the fffuuuuuuuuu- happened to GMST?

I think Nexon is justified for not having a tespia since Ariant. Why would we need a Tespia for the last few patches?

Nexon wanted the entire game to experience CWK at the same time just as JMS with Neo Tokyo. There was no JMST for Neo Tokyo.

Other than that, there was no "new" content since Ariant.

Singapore? That definitely qualifies. Heck, Singapore was released in less versions at the time we got it than Ariant was at the time we got that, but they didn't test Singapore. It's too late to be testing for Magatia, so you can add that too.