The Elite Skill: Battle Standard should have Skill 2 changed to cast while moving instead of rooting you and the Stability duration increased from 3 seconds to 5 seconds without increasing the Stability stacks.
The reasoning behind this is so the 2nd skill is aligned with other banner skills in being able to cast while moving while the duration increase allows you/allies to secure a stomp without overlapping with Guardian’s group stability shout which provides more stability stacks but no offensive boons.
There’s also many other changes that others are suggesting such as cooldown reduction or overall skill revamps that may require more extensive balancing. However, these two suggested changes are mainly quality-of-life changes that’s aimed at making Skill 2 more smooth and functional so extensive balancing isn’t required.