|Going by your understanding of convenience, every single piece of the plot is convenient. It's a TV show, they've given Chloe more purpose, what's wrong with that?|
There must be many scientists aboard the Destiny who actually studdied the ancients. As you might remember, they were on IKARUS to find the 9th chevron. Any of them should know more about Dr. Jackson's work than Chloe ever could have gathered by 'reading his notes' ... (whenever and wherever she did this; maybe the blue aliens told her Jacksonomy)!
And here you really wonder why Chloe became a main character in this show. Up to now (including the 'moment of brightness') she hasn't done anything worth it being front line. Well, maybe sleeping with Scott is what gives you the privilege. Yet, wait, didn't she just betray him a few episodes ago?