Finished my first full playthrough as SoB, and the faction sadly feels like an afterthought. Soldiers are weaker than marines, armors are worse than marines while being 5 times more expensive, half the tech tree is locked out with nothing unique to compensate for it, etc.
I used my standart troop carrier, standart armor, and standart bolters for the entire 80 hours, because everything I researched was ruinously expensive and at best a minor upgrade. 500 adamantium and 5 honor badges for an armor that has the same protection values plus a single-use energy shield? 20 badges for a 2x2 unit that dies to a single plasma autofire and has no ranged attack? Why do saints even get firing accuracy bonuses when they can't use guns? Why can I research power swords when even with full upgrades and armor sisters don't have enough strength to ever wield them? Literally the only upgrade I used in the entire game was the master crafted bolter ammo.
Also, the game crashed every time I attempted an eldar mission. Missing PCK for wraithguards.