User blog comment:TremendousDerp/Geminix - The Twin Diamond/@comment-1985493-20130605210051/@comment-8185594-20130606005535

The pasive is not meant to be strong, but it certainly isn't worthless. For example, let's say you cast a rank 5 Alignment Beam 4 times in lane (you'll obviously use it more than that but for simplicity's sake let's keep it at 4); that amounts to 90 heath regeneration (150*4*0.15 = 90), which if you consider how much an HP potion heals (150) and how much it helps out in lane, doesn't sound terrible.

Also, the Q and Ult are meant to be fired in the fog of war to make them easier to land (they have massive range, so it is entirely possible), and the Q deals decent damage on its own. Lastly, the massive health costs are there to prevent spamming abilities whenever they are off cooldown, but actually to use the abilities situationally. I certainly do not want empowered Q's with Ultimate levels of damage ( 460 (+ 125% AP) ) to appear frequently. By the way, Rumble's Ult also has a 1.0 second delay to it for the last missile to land.