One of the things you can take from this video other than the knowledge of the problem of the advancing nature of the sound when you ascend and descend the pick on the strings which you need to be aware of when you practice sweep picking that you don't get cheated by that and start practicing and really monitor closely if you can hear each and every note.

Is to combine another technique that you are contempt with so you can sort of split test the sweep picking with that, as I do for example in the video is to combine sweep picking with alternate picking and listen if the quality of the notes are equally good between the techniques, and you are the only judge here so do yourselves a favour