I mean, yeah, when you really get down to it. No matter how one feels about how her character turned out, the idea of adding a character who is
>>Another Purple Smart
>>Gets almost as many free rides from Twilight as Twilight gets from Celestia, more if one factors in Starlight is a 100% unpunished criminal who's caused apocalypses and time terrorism
>>Is even more magical then the Element of Magic
And 2nd Purple Smart even become's Purple Smart's apprentice, which all just seems masturbatory from a writing perspective.
Maybe not the character herself, but the scripts these ideas came from could of definitely used a little magma bath before they were finalized.