I think that many Warrior skills will be useful for other classes too, so let’s start with the general overview.
Earthquake
Basic but pretty promising. It is a basic Slam that creates a Jagged Ground Effect which slows enemies and erupts after 3 seconds, dealing damage. The best course of action to make it strong is stacking multiple Jagged Ground Effects together while you are spamming the skill.
To do so you can combine it with Stampede which can be used to start the fight and use Jagged Ground Support together with any other skill such as totems or any supportive damaging skill.
It will allow Warrior to erupt multiple Jagged Grounds dealing more damage and should be viable even in the endgame.
Boneshatter
Compared to PoE 1, Boneshatter doesn't look as good anymore (as a main damage Skill) and should mostly be used to heavy stun enemies that are primed to stun.
Together with Enduring Stuns Support it can also provide Endurance charges pretty consistently.
Impact Shockwave Support can also help to use it for AOE clear as well.
Sunder
Looks like a very strong Slam, which has great damage effectiveness of 237% and 100% increased critical damage bonus which makes it just amazing for endgame.
I’m sure that Sunder will be one of the most viable skills for Slam gameplay due to the pure numbers.
Armour Breaker
A nice supporting skill which could be used on bosses and rares just to break armor and improve the damage of your other skills.
However Boneshatter with Devastate support can break all armour too so there is some competition between skills, but since we have a lot of slots it can be a nice idea to utilize both.
Ancestral Warrior Totem / Shockwave Totem
Both are totem options and we again need to choose only one of them, because there is a totem limit. It could be bypassed with Ancestral bond keystone but even with that it still will be 2-3 totems maximum it seems.
Shockwave Totem can stack well with Earthquake interacting with Jagged Ground.
Ancestral Warrior Totem is mostly there to carry dedicated totem builds and looks pretty strong since it can use socketed Mace Skills. Some builds around it are possible for sure if you prefer the Totem playstyle.
Resonating Shield
Allows you to block all incoming hits while dealing some damage. Looks like it is the best defensive ability that still can be played offensively, stacking some damage through Armour on the shield.
Infernal Cry / Seismic Cry
Both are Warcrys and since they both consume endurance charges it seems like it would be better to choose only one to use consistently.
Infernal Cry provides Fire damage so should stack well with Hybrid or Ignite related builds.
Seismic Cry on the other hand is mostly physical oriented.
Both Warcrys should work better with slower skills and stack especially well with Hammer of the Gods for a huge DPS increase.
Hammer of the Gods
This is probably the strongest skill that was showcased in POE2 so far.
It deals a crazy 1307% of Attack Damage but has a HUGE cooldown of 24 Seconds.
Right now that skill looks like one of the best options to do boss damage, especially paired with Ignite if it will apply it without downsides. Solving cooldown issues is an important part too so Hammer potentially works well with Chronomancer.
But generally Hammer looks good enough to find space for ONE big hit in most of the melee builds.