Boldur is probably the best balanced character in the game. I personally don’t even see his lack of AoE and CC as a bad thing. It’s unnecessary. He’s a tank, the most durable one in the game (3k+ health and 50%+ Dr with boosted attack speed isn’t hard for him at all), and no one ignores you. That’s the most important thing is that you draw fire, making distracted opponent’s easy prey. And how can they ignore you? If they do, you wipe their minions and push on, trashing the objective. It’s not like his damage is bad (Remember, rage + gear can get your attack speed to +40%)
Early on he isn’t great, but just get some attack speed and build/clear till you get rage on dash. Now you can reliably engage. Lvl 5? (Insert Boldur laugh here). You can hold 3 enemies and fight 2 at this point. And level 10 is the mother load. True DnD Dwarven Barbarian Mode activated.
I can hardly go back to Attikus, unfortunately. Unparalleled survivability is a hell of a drug.
His level 10 is fine, IMO. Hell, everything about him is fine. Leave Boldur alone.