It's a very different type of game play and was probably a side project that barely got the green light....I just hope they add more stuff like this a rotation of events would be fun HM, SRL, trials and banner...arms day...faction rallies...fishing...bring back the black armory forge...so much they could have to break up the boring grind the game
I want way more stuff, but I think the polish this mode needs will be too much (i.e. a complete rework of large vehicles within D2); the only way I see that happening is if they add more vehicles to PvE and have them be more than a gimmick (which is all the Drake is in the campaigns, lets face it). I'd love to get my hands on an un-nerfed Brig or one of the Cabal hover tanks in a PvE (or PvP) setting, but I don't see it happening, sadly.
If they would probably implement all the temporary gimmicks over the years they could make the world feel more alive...all they need is some consistent world building and distribution of the gimmicks around the play areas that make sense and it would change the game big time and for the better