The hounds will only be as useful as you make them, even if they remain entirely physical combatants. In this particular case, it was likely the lack of detail regarding their attacks that lead to the perception of them being low-grade mooks. In the absence of specific detail, I had to run with the information I did have and create the detail myself, though keep in mind that none of my attacks have been successful yet. 

As an attack, having three extra (if weaker) characters to work with can be extremely versatile and powerful if used correctly, just like any other character's abilities. At any rate, I look forward to seeing how those three evolve with time and practice.