1.Infinitive phrase as a noun: "to gain a broader perspective" functions as a noun phrase, explaining the purpose of seeking advice and adding depth to the sentence.
2.Relative clause: "that they might not have thought of themselves" is a relative clause providing additional information about the "invaluable insights", enhancing the sentence's complexity.
3.Present participle phrases as adverbials: "weighing various opinions" and "avoiding potential pitfalls" are present participle phrases used as adverbials to describe the actions involved in making informed decisions, showcasing advanced grammar usage.
4.Adjective phrase as a subject complement: "incredibly enlightening" serves as a subject complement, describing the effect of seeing the issue from multiple angles, adding richness to the expression.