I voted 'yes' here because of Renzoku Energy Dan. A combination of melee and ki blobs is a great way to increase PL, and Vegeta has the longest journey to SSJ of the four Saiyans - and arguably needs it the most, with GG being potent early on but losing usefulness as opponents become stronger.
Trying to combine melee and Renzoku is pointless. Even if an opponent hits the ground stunned, in the time it takes to charge up and unleash the blasts you'll only have a kiblob there for a few seconds - the victim will quickly recover and teleport away. Consider this compared to everybody elses' rapid fire, which can create a growing kiblob capable of chewing up an enemy for at least six seconds before they break free. Renzoku is just a burden, not an improvement.
In practice, it makes Vegeta less effective with rapid fire than everybody else, which surely wasn't the intention. With that infalted charge time and the ease of escaping a kiblob and deflecting ki shots, he's less capable supporting his melee with rapid fire.