I would like to see the extra vocabulary contain more of the expressions that are directly from the lesson. A good example of what I would like to see is from Rocket Review.
Currently, the extra vocabulary has (and for expediency I am just giving the Pinyin without the diacritics) huanying, di'er, danyuan, diyi, ke, hen, Tai haole, Xiaci jian. Most (all) of these words appeared in the extra vocabulary from previous lessons.
Rocket Review includes the following words: ji hua, qu, luxing, jihua qu luxing, xia ge, xia ge yue, yuanyi, he, yi qi, he wo yi qi, shi de, feichang, xiang, difang, kan, kan yi kan, xiao, xiao shi hou, zhu, zhu zai.
If the extra vocubulary included these words in addition to what it already has, then the testing sections would also include them. We can then master (mark easy) the simpler words without having to master entire sentences like "Ni xiang qu Zhongguo shenme difang" or "Wo jihua xiageyue qu Zhongguo luxing". You already have the recordings of these phrases (see Rocket Review) so please consider this for this section and subsequent sections.
Also, it has been a long time since I listened to the whole lesson but if they include phrases that are not shown in the text (as sometimes they do), that would be good to add to the Extra Vocabulary.