The fact that the deck can recover from 8 forces isn't reason to play them. To be fair, I'm not sure what your local meta is like, whether you play online or in paper.

In a room full of mono belcher, yes play 8 forces. In a room full of 4C pile and delver, force of will will put you too much behind in the early game that your opponents resources will come online before you can really stabilize.

Often (not always), will you find yourself boarding out force of will in midrange match ups, and if that is what you can expect to face, g1 with 8 force of wills will probably put you on the play game 2. But to be fair, it will depend heavily on what type of decks you expect to play against.