The only part of this that seems to hold true is less items and more shards. Heres another lovely example of a Level 70 Dungeon Chest, Ruby this time, since these “improvements”:
A rune is showing up as the last item in the chest, a place previously only yielding an upgradeable item, like gear, or spells. Runes and scrolls never appeared in this last spot until these changes which means that you are clearly getting more runes/scrolls, not less. Also, as it has been pointed out, why have shards back in dungeon chests. The whole idea was to give value to Skirmishes and at least from my perspective, make it easier for players to acquire specific gear from dungeons. These changes undo all of that and are a clear worsening of the game, not an improvement.