Champions Online takes a look at this with a new development blog looking at how the Telepathy and Laser Sword mini-sets came into existence, straight from the hand of developer Chris Meyer. Meyer explains how Telepathy's revamps came about as a result of the set needing more cool stuff to do, while Laser Sword was meant as a thematic complement to a story arc.
Both sets were intended to reward players for taking multiple powers out of the same set without explicitly forcing that behavior, creating cross-power synergy and positive interactions. This also led to certain design issues, such as the initial Laser Sword design feeling clunky and not having enough options for players in terms of passive powers, something that required a reworking of the set's focus and the addition of passive powers that work with other sets as well. If this sounds fascinating to you, you can find more of the hard design details in the official blog.