Dude, you're being awfully argumentative and defensive.
Paladins and rapiers, kettle. Paladins and rapiers.
But it's not like the Druid has ever been the most popular class.
Which applies to a number of classes (e.g. bard, cleric, monk, etc.) in D&D, does it not?
But your argument about the history is also self-defeating. I mean, the druid WAS a subclass of cleric. That's the "origin" of the druid. What we would now call a domain. Druid is to Cleric as Illusionist is to Wizard (Magic User).
As were the ranger and paladin subclasses of the fighter. You are welcome to subsume them back into the fighter, but this should be consistent. And it certainly seems odd, if not hypocritical, that we have no problem with so many full arcane spellcasters, but find druids and nature clerics redundant.
But speaking only for the tables I have seen, people either want to play the druid for shapeshifting, or don't want to play it. Your fun is different, and that's cool. I am simply noting that I happen to agree with what Mearls wrote. You disagree. So be it.
I have seen players, again myself included, play for both. It's part of the appeal of the druid. For me though, part of the fun of the druid is having the full magical power of nature and shapeshifting at your command. Now, even for those who want to play the druid for shapeshifting there are problems with the 5E Druid - such as preferring a particular form for the aesthetic (e.g. dire wolf, eagle, etc.) - and simply turning the druid into more of a shapeshifter would do little to address those problems with how Wild Shape is presently designed.
So I do think there is something to be said for animal companions to be pulled out of the ranger and given their own "thing"... and wildshaping pulled out of the "nature caster" and given their own "thing", and superiority dice given over to a class as the baseline "thing" for that class. Obviously it won't happen with 5E... or at least not in 5E any time soon. Maybe three years from now when they make another new "Big Book O' Mechanics" they go ahead and create new versions of the other classes in addition to the Ranger they're probably doing for the one in the fall.
I agree that the subclasses of the druid (as well as the ranger and fighter) were poorly implemented or thought-out, especially given how the capstone of the druid incentivizes the Moon Druid over the Land Druid. The 5E Druid almost comes across as "Oh,




! We have a subclasses model for classes, so let's split this core druid up!" But another, if not more pressing problem, is not simply the presence of Wild Shape but how it is designed in the first place. I would much rather explore addressing the problems of Wild Shape in 5E before resorting to a radical reconceptualization of the D&D Druid.
Why are you so concerned ("incredibly troubled" and "deathly worried" and "alienated")? It's not like he will break in your house and steal your PHB and cross out the existing druid and then paste in a new Druid. We're talking your worst case scenario being him publishing an optional alternative druid. How would an optional different druid alienate you? Is the thought that someone out there might be playing a druid you don't like really bothersome?
An additional alternative druid or a possible direction for the shape of the druid in a hypothetical 6E? To me the shape of the 6E druid (and its subsequent future) is the worst case scenario. That may be a long way off, but it will always be a lingering thought that the old-druid will be on the chopping block in favor of this neo-druid. Irrational? Perhaps. But that is my gut reaction to Mearls's comments.