After taking some time off for a few months I am returning to play again at MR11 with around 450 hours of game time. I will tell you that some of you vets sound way too entitled to even have an opinion here. Why should it be up to you how content is gated or released? Sure you have all these days played and this high mastery, but why should you have any authority - your experience is based on the course of time over a long period of evolution and not where the game is today. It's almost like if DE listened to you lot, the game would never change.
I've been playing Warframe (since when it only had like 3 or 4 frames) for the last 7 years because not everyone can play like a hardcore vet. I dont know what some of you do to accumulate so many thousands of hours, but I'm not the only person who cant spend 8 hours a day 7 days a week for 7 years playing a game. But I love this game, and as much as you feel like your time should be rewarded, all players, no matter how much tenure they have, just want to feel like the time they spend playing gives value to their experience - whether it's one hour or one thousand hours - that's what keeps players coming back, and that's what is good for games with a legacy such as Warframe.
For me, Helminth gated at MR15, at the rate I play, I might never subsume one frame - and if I do, well it might not happen this year. Helminth gated at MR8, well, now I have some work to do that I'm not even close to accomplishing today, but I have something to reach out for.
There are middle of the road players too, not just noobs and vets. I'm chugging along just trying to have a good time, enjoying the experience, not trying to get anywhere so fast that I never did see what I passed by. And of all the zillions of things there are to do in Warframe, its somehow perceived that I'm not allowed to have access to content when a super-educated noob who read the whole wiki in a day, and has nothing to do besides play video games can crush a two week session to MR8 and subsume their first frame - just because some vet with 10k hours says so? Gimme a break. I'm not sure what hurts more, that you may have wasted your time, or you're not really as admired as you thought you were.
Warframe has got to be easily one of the least toxic multiplayer environments in modern gaming (besides Guild Wars 2 - that place is happy land), but after reading many comments in this thread, its seems there may be a subculture of bitterness hiding in the shadows.