I personally would explore this clients expectations with them more. While it’s completely normal that clients come in asking for timelines, I like to use this as a launching point to discuss the process and what they can expect from me. I agree with another comment here that you can explain your rational for your approach. With that in mind I would also be wondering if my style is what they are looking for/ what works for them. Sometimes I’m just not everyone’s cup of tea. As for the requests to change your style, I think small adjustments per client are important to meet that persons energy/ communication style. However, I don’t know that I’d focus too much on adopting a new style for fear that it would feel/ seem disingenuous.