I finished buiding Limbo less than a week ago, and he's already surpassed Vauban and Frost as my favorite frame to play as. Limbo brings a whole new dimension to Warframe (Pun intended). I really enjoy that his play style is drastically different than any other Warframe, and that there are so many fun possibilities to explore with his abilities.
So why does DE want to change the way Limbo works? I honestly think that every Warframe should be radically different than every other in (Including Ash and Loki), but with a dependable weapon or two, the differences become negligable. I've been playing Warframe for almost 3 years now, and until I got Limbo, I was starting to tire of the same old grind. Limbo breathed new life into the game for me, because his abilities work flawlessly together, and his playstyle is so radical and different that it's almost like playing a whole new game. I say that every Warframe should be a 'niche' Warframe. That way, everybody can find a playstyle they really enjoy and run with it. As of now, there are so many warframes yet when you break it all down, they're basically the same playstyle, with their abilities making little to no difference in how you play the game. For example, the first and fourth abilities of almost every warframe have almost the same effects. First ability does good damage to a single target, two if you're lucky or skilled. Fourth ability kills everything around you. second and third are unique, but unless it's as handy as Frost's Snowlobe, they're hardly used.
So, I admit I have no idea how DE is planning on changing Limbo's mechanics, but I'm still against it. Yes, he's a niche character, but unless you're goal is to get every Warframe, weapon, and everything else to lv.30 (which I should add is incredibly frustrating and caused a few of my friends to quit due to constant additions to the game), then finding a 'niche' Warframe just magnifies the potential this game has. It would allow players to find their own ways to play the game rather than just grinding for the best weapon or modding for grineer, or most balanced weapon, or whatever, and focus the game more on finding what weapons or Warframes you enjoy playing most.
Sorry about writing so much, but I feel strongy about this topic.