There are plenty of Elite mobs in the areas that require groups to defeat. Unless you're a high level, anyways. But once you're a Veteran it's completely out the window. You need other people for certain quests. Especially the ends of some quest chains in particular. As well, there are anchors that drop that require a group, and like many other MMOs, there are dungeons and instances that you need to group for. They are adding a larger Raid in soon as well that will also require people. It's definitely not just TES VI. It still feels like an Elder Scrolls game, but it also feels pleasantly and refreshingly different. Expanding on this, I think it's a very refreshing MMO experience period. It's different from anything else out there.
What stage of Beta were you in? I was in nearly 6 months of the Beta before it was released, and the only stages that were a problem were the early ones where there were still watermarks on your screen. I had no problem grouping or using Zone chat to find groups. Even less so in PvP. Getting to the same location as other people is/was actually pretty easy? You can just right-click their name and click 'Travel to Player' and it takes you to them- free of charge as well. Not sure if you were aware of the feature or if they had disabled it at your time of playing, but it's incredibly simple. I was actually truly impressed by all the means in which you can communicate and group with other people.
That being said, I think their Group Finder needs some work, but it's still a good feature to have. Just refine it a little and it'll be perfect. The Group Finder is something you can use to automatically place you into someone else's group based on your role or have other people placed into your group. Whether that be for Elite mobs or dungeons or instances. There is a category in the drop-down menu for each.
Anyways, I yammered enough. c: Hope that answers some things!