Thank you for bumping the thread, it allows more players to see it, and contribute to the discussion. These designs are actually partially a collaborative work, as some aspects of them were suggested by other players, aspects that I thought 'hey, that's pretty good, I should weave that into the design'. The WHM having Protect upgrade to Plenary Indulgence, for example, came from someone I butted heads with almost a year ago, even when there's some disagreements, common ground can be found. So the more people that see this thread, and comment, the more the ideas evolve
The 'constantly repeating myself' that was getting tiring, was players like yourself coming into the megathread, saying 'yeh but I don't see anyone offering ways to fix it' and then me explaining a portion of these designs, to show that 'this is how I would fix it'. Typing out the potencies, the maths behind how close in performance 'playing optimally' vs 'spamming Broil' would be, etc. was a lot of work for something that ended up happening every 20ish pages on average, so I elected to make this thread so that I can just say 'This is how I'd fix it' and link here. If they don't want to read this, they weren't ever looking for an answer to their question in the first place, instead just looking to 'gotcha' people who aren't as obsessive-compulsive with the topic as I am.
After several expansions of us saying 'This design direction for healers is not going the way I'd like it to' and radio silence from SE, I don't care to just carry on saying 'this direction doesn't match what I'd like', I'd rather suggest ways to fix the problem. If SE uses anything I've written (even if it just inspires new ideas, rather than directly taking 1:1), that's a win in my book. If they don't, I can at least say I've tried everything I can (short of printing it out and thrusting it into the hands of Yoshi-P directly at a live event). The ingame 'Leave a suggestion' menu does mention this specific part of the forums as the place to leave suggestions, though:
Strangely, no mention of keeping to a single Megathread
As for 'One megathread is sufficient', JP might use the concept of megathreads, but the west seems a lot more inclined to use the 'multiple threads on the same topic' method. For example, the concept of 'megathreads' didn't stop people throwing up so many threads about their character creator issues, where 'one megathread would have been sufficient'. But IMO it's a good thing that those players could make multiple threads on the topic (of character creator update), because it allowed for more detail to be placed in each individual thread. The Elezen problems were not drowned out by the Viera problem reports, the Viera reports were not drowned out by the Miqo'te posts, etc.
Assuming you read the designs on the first page, how would you suggest that I fit all of THAT, into the megathread without it A: being an unreadable mess, B: being in relatively the same place in the thread (eg: since people post so fast in there, how can I guarantee that all four Healer posts are one-after-the-other, not split between pages, etc), and C: easily findable by anyone at SE (or the forum moderators) who was looking for it? I don't think such a thing is possible, and even if it somehow were, it'd disappear into the sea of comments saying 'is this stupid crap still going' and the like, which doesn't do much good when the ideal scenario is 'SE sees these ideas and gets inspired by them somewhat'