It is one of those texture packs that takes vanilla Minecraft and touches upon many aspects of the game with a good sense of originality, creativity, and a good degree of attention to detail. Stoneborn resource pack commits none of these sins.
You can see that there was little effort invested in making something unique, original, and enjoyable. The ones that are forgettable fall into this category for simple reasons.
While most are forgettable, there are a few that are amazing. There are plenty of Minecraft resource packs that are meant to add a medieval vibe to the game.