I personally think the Solarium on Titan is an exceptionally cool place but i am sad that i don't get to go there more often! Currently, Titan is the smallest of the maps but with a fast travel in the Solarium and chests and events in there the whole place and the surrounding tunnels could be utilized! I spent a lot of time on Titan because i really wanted the armor but to be honest, doing the same 2 laps over and over again gets pretty boring! I just don't want to see such an amazing location be forgotten after doing the adventures and missions there!