No change to the Standard Bearer 15 card.
However, the Standard Bearer 19 card has been changed from "if you healed one creature this combat, gain one power stone" to "Discard a small creature under this Shield before combat begins. Your remaining creatures get a Vitality bonus equal to half the discarded creature's Vitality, rounded up."
The reason for the change is that I was struggling for ideas at the end of the set. This was a quick and dirty idea that basically takes the cost away from healing. Rather than do that, I decided to play into Balor's discard ability while making the benefit more aggressive. For instance, Sun Spirit gives all your other creatures +6 Vitality, but you're losing a 12 Vitality creature to do so. It's very situation-based.
Also, the Ship, Stygian Ferry, undergoes the following modification: "If you destroyed at least one creature this combat, gain one power stone" changes to "Opposing creatures lose all immunities for the duration of combat."
This was changed because there was already a standard bearer giving you a power stone for winning combat, so this seemed kind of redundant. I liked the idea of messing with immunities, which no other cards do.
There will be a few more changes coming...