No class in this game can be called particularly difficult. Be it’s Augmentation having to minmax and oversee their teams CD usage, or a Retribution pressing his rotation - they are both not difficult to do. Both are abilities that most people can master given the time and effort required. Not to mention there is more a perception change of what is than anything. Both are pressing their buttons at the right time in essence. The true difficulty in this game comes when you start minmaxing the gameplay as a whole. Not only your performance, but how it interacts with your team. So when I refer to easier, it is ease of use, or simply - the less impact the action got on multiple elements, the better.
If you feel offended by me calling it easy, I am sorry. My intention is not to dissmiss the difficulty that is playing the spec correctly and efficiently. My opinion is tightly connected to the statement written as a whole. So in this case it was in relation to the strengths and content mentioned.
My point was never to lessen FDKs, but to prop unholy up, as I do wholeheartedly disagree with your statement of: Frost being the superior of the two as of now.
That based on performance metrics and individual situation. Both that I put forth my opinions about.
To the question of how relevant the Meta is for +19s? Just as relevant as bringing a FDK over a UDK in a +10. The lower you go, the less it matters at all. I will even go as far as if you are doing content around the +2 to +16 range, anything really goes. You can bring 4 rets and a protpally. You can bring 3 Fury Warriors. What matters at that level is less what the minmax potential of the class and spec is, but the players individual ability to play the content. Mind I am not saying there isn’t an optimal comp to do the task. What I am saying is that the comp at this level of play got low impact comparably to individual player skill.
For the community, Meta really shouldn’t matter. Fun should matter. As lack of a meta build is not what is going to hold the majority back in any way. Sure, you could go to the extreme and argue; you saying you can bring 5 healers! lolol - that is not what I am saying. Within the basic structure of how M+ is played, anything goes, and even that is quite flexible going outside its rules.
So to me, saying ‘go FDK as it is superior’ holds little to no weight. I almost kind of resent the sentiment. As it holds little to no merit for how the game functions or how OP should interact with it. To say FDK is more forgiving for how it performs within a PuG is fair to point out. To say it is ‘the better pick in all ways’ is not necessary true.
From that I let the reader form their own opinion on what they prefer to value.