星巴克：工会向代表们提交的提案“不完整”，对达成协议持乐观态度。

Group 1 - The core viewpoint of the article indicates that Starbucks is optimistic about reaching an agreement despite the union's proposal being deemed "incomplete" [1] Group 2 - The union has submitted proposals to representatives, which Starbucks considers not fully comprehensive [1] - Starbucks expresses a positive outlook towards the negotiation process and potential agreement [1]