Are pre-releases worth it?

Bumping this because the pre-release is getting closer and half of my question was never answered: is Surging Sparks gonna be good? the card list is available on the website now, but I don't know if thats the whole card list or if they're gonna add more. From what we have so far, is it a good set, or should I wait for a future one? Is the pull rate good, and are the good cards actually good? Also, out of curiousity, is the list on the website the complete list, or are they adding more?