So after a week with companions on Xbox, I thought I'd put out some of my thoughts on them.
Overall, I think they add an interesting element to the gameplay. Even under geared they provide some use. I've only been dealing with running Mirri as a DPS with staves, so this assessment is really only from a damage dealing perspective. And despite some of the combat flaws, it is really rewarding when a fight is successfully managed using a companion.
Gearing the companions is fine, mostly, and profitable for sure for unwanted pieces. I don't even mind the drop rate, even if it sometimes seems like they will never drop.
But, some issues that I think, if addressed, would go a long ways to making companions pretty solid:
Companions need to move out of enemy AOEs immediately. On console at least, the companion controls are incredibly clunky and outside of the heavy attack targeting not really viable. Even then, not always a guarantee that the companion is going to move anywhere, or to a better location.
Companions also need some sort of tethering option in the Gameplay Options. Something that allows a user to force the companion to stay within X radius of the player. Too often I find my companion halfway across the dungeon after several roll dodges. A tether option will keep companions close and not risk resetting fights or dragging enemies away from the player unnecessarily.
On top of these first two combat issues, just some sort of enhanced tools that can be used to further customize companions would be a great improvement. Tying the target prioritization to heavy attacks is great in a vacuum. But often I found having to do a random heavy attack on a different add to get Mirri to focus it, and then refocus back on the boss myself. But, if I needed to do a heavy attack for resources it immediately broke down any commands given unless I turned and heavy attacked the add set as priority. And, if an add was directly attacking my companion, she did nothing if I had already used a heavy attack elsewhere. Some sort of smart targetting needs to be added, with either health, or enemy "class" as a criteria. And companions need to immediately re-focus attention on enemies that are attacking them.
Gear should drop from all locations that a companion can be used in. This is fine for group dungeons and delves and public dungeons. The bosses all drop loot and all have a chance for companion gear. But, DSA seems to be an outlier. The bosses only drop gold and so far, after 3 solo runs, it appears that not a single round of the arena can drop companion loot. This should be updated.
Gear should have a chance to drop from Treasure Map Chests. It can be a super rare chance, but it would be a great addition that would still encourage players to explore zones, add more value to treasure maps, and provide more opportunities to gear up companions. And this is already partially available as the CE maps for Blackwood guarantee a companion gear piece drop.