Untamed is a highly survivable, powerful damage dealer and very useful melee offensive support with surprisingly high flexibility.
Featuring better control to its pets and access to the Unleashed Ambush type of skill, Untamed overall usefulness has another dimension beyond its pool of weapons and utility skills, and that dimension comes from pets. Similar to Soulbeast, Untamed can use and manage 3 different skills at will depending on the current pet, but unlike Soulbeast, these skills are tied to the pet, using its stats and animation locks (this means that you can use any pet skill without interrupting any of your own animations at all).
Untamed gets built-in and non-commital higher vitality than the rest of the Ranger specializations, extremely solid sustain and a wide array of defensive tools; with these qualities being inherent to itself there's no requirement to sacrifice part of its powerful offense, as such, it's usually considered one of the top-tier Open World specializations.
Regarding Untamed's playstyle, it is generally fast-paced, with many instant casts, a pet to manage and a rotation based on switching stances, improvisation on real encounters and a focus on the overall rotation loop. However, most of its skills can be queued and mistakes on the rotation are easy to manage and not considerably punishing, thus, can be considered a low skill floor/high skill ceiling specialization.
Untamed is somewhat limited by an important conditional, as it is having skills and traits that are reliant on enemies being defiant. While it is rare, easy to determine and doesn't suppose a massive loss, that is to consider.