I'm too lazy to look for sources, but the answer is yes they're working on bringing more but it takes time to figure out how to get AI To do mechanics (or get them to cheat, like how they can just walk through the spider webs in Toto Rak and how they have super stats)

We're getting 3 additions for 4.2 (January 30th).

I was hoping for Cutter's Cry or Qarn, because 32 to 41 is a big jump and those are the only 2 dungeons between those levels, but alas it was a 44 (much needed as there is also a gap) and two 50's.