Many players came to ESO for the MMO aspect. I know a lot don't, but others do.
Many players, me included, have given feedback to Zos in the past suggesting to "push a little more" the grouping aspect to players.
I'm happy they listened. The reason we asked for this is that the game "felt dead" - it was NOT dead, as some proclaimed, but it felt dead. Seemed like everyone was closed in their house crafting furnishing or whatever XD
Today the game, the world, feels more alive, and thanks to challenges you meet people more often.
I appreciate what Zos did.
I understand some players may be on the "introvert" side and enjoy more a solo experience, like an offline RPG, but others like me could feel pretty lonely wandering the huge wasteland Nirn was before this change.
Now, I'm not saying your issues are not valid points. Just giving a reason WHY Zos did this - it was requested by many of us.
EDIT: I'm not even saying anyone is wrong or arguing. Just that there is another side of the coin where people actually want these changes.
