Major moves were made during Sunday's negotiations for a new WGA contract, with the companies now offering the WGA more than they were asking for to bail out the guild's ailing health plan. A source close to the talks told Deadline the AMPTP is now offering to increase employer contributions to the plan by more than $85 million over three years – up from $60 million in its previous offer. Another major move came in the area of a new pay formula for writers and…