> Their biggest problems came with being "creative" (their solutions were pretty "stock")

LLM designed UIs will always look generic/stock if you don’t give it additional prompting because of how LLMs work - they’ve memorized certain design patterns and if you don’t specify what you want they will always default to a certain look.

Try adding additional UI instructions to your prompts. Tell it what color scheme you want, what design choices you prefer, etc. Or tell it to scan your existing app’s design and try to match it. Often the results will be much better this way.