The community wanted the incentive for people to come in, NOT participate, and be rewarded removed. We enjoy getting tomes from our preferred endgame of choice, but disliked others who held it in contempt trying to use it for selfish gain.
We wanted the ability to duel. . . They gave us ONE PLACE to do it. And while you consider it useless, it's drawn the attention of the curious and gotten them to actually try PvP. I personally met and began training my first "student" on day one, and went on to teach others from there, eventually creating Goblin's most successful PvP linkshell and connecting the various PvPers on the server. I still see random people, not even regular PvPers pop up there from time to time to duel each other for fun.
Light Party offering rewards, again, unfortunately drew people who sought to exploit it for selfish gain. SE removed that not because of them, but because they have plans to relaunch a more formal, structured Light Party Feast.
The lack of rating decay and desire to rank up fast to avoid the new, the curious, and admittedly, the lesser skilled is what makes Feast seasons slow down over time. Poor matchmaking poses greater risk to higher ranks when placed with lower ranks that, now, can't be effectively communicated with. That has nothing to do season duration.
There are PLENTY of successful healers from previous seasons under the 3.x PvP system, some even top 10. Your statement is both untrue and heavily based on a personal opinion, and just as said before, you see all that was wrong, and not what was right all along.
As far as judgements are concerned, who would it make more sense to listen to, the active community that formed around and enjoyed that "terrible" 3.x PvP where everyone else hated and avoided it purely from word of mouth or personal bias, or those people who hated and avoided it, yet would turn around and say "the Nadaam is awesome! We want this for PvP!" but wouldn't touch Seal Rock? Should SE listen to casters on how to build a better Bard or Machinist? I mentioned that for a reason; the PvP community was just as unpleasantly surprised as BRDs were in Heavensward when they were suddenly made into half-casters. Bards didn't ask for that change, and they didn't like it. This is no different.
We get it: you didn't like 3.x PvP, nor healing in that system. Many loved it and had no issue with it, and to have it suddenly torn away and replaced with an unfinished "foundation" of a system is a huge disappointment. The part of the community that actually liked PvP - and played it - now does not like it, and the ones that disliked it without trying it now suddenly like it. And not even for the actual gameplay, but just another means to an end. Tomes and exp, both of which they can still obtain in greater amounts from other content. . . Do you see where the issue is there?