人々の意見は各種各様で、まとめるのが難しかった。
People's opinions were diverse, making it difficult to reach a consensus.
多種多様 also means 'many kinds and diverse', but 各種各様 stresses that each individual item or type is different.
A yojijukugo composed of 各種 (each kind) and 各様 (each style/manner), literally meaning 'each kind, each style'.