Doesn't have to be all of them but some of them would help out a lot, these are just ideas that can help change WAR.

Let us be parry masters like before. Make parry % value higher for warriors in nature by making STR give a larger boost than any other class (i'd like to go str over vit on stat points thank you very much)

Introduce an offhand for Warriors or 2 handers in general like for WHM(Thyrus)/DRG(Gae Bolg)/BLM(Stardust rod) like "Grips" in FF11 that will give them additional stats or new ability/passives? Hell they could even add like a "Relic grip" or crafted grips.
Perhaps something like:

1. Grip with STR+/Determination +/Skill Speed +
2. Grip with VIT+/Parry +/Dex+
3. Grip with unique ability like "Double attack" (would give us a unique ability which doubles the next weaponskill/abilities dmg on a large cooldown like 5min)
4. Grip with a passive trait, something like example "Retaliation"(counter's damage at a certain % or something) or "Enhanced Berserk"