I probably should add that you don't 'need' any more clips. You've got more than enough to play. You only need more if you want a clip permanently on every dashboard (like I do because I'm too lazy to change them around) or if you want them colour-coordinated.
Well OP said "if I wanted everyone to have a stat clip" so that's going to be a lot more than the 14 provided.
That said, even if you just have the core game + stretch goals 14 may not be enough in some cases.
With all the 1- and 2-point heroes we got as SGs, it's easy to make armies that will require more than 14 clips. Even if you take into account that troops won't need clips.
Especially in 4-player games with 32 points on the table you'll only have 14-4(Gods)=10 clips left for 4 players. Which won't be enough for a lot of decks/configurations. The core retail box may only have a few 2-point heroes and monsters - but all the SG add a lot of other low point units.