Obviously you will not be able to get specific design suggestions with a survey. Users will not be able to tell you the optimal choices to be made (see uxmyths in source)
Yet, you can still know how necessary is the redesign with The One Number You Need to Grow question:
- "How likely is it that you could recommend [X] to a friend or colleague?"
You could go a bit further by asking a remarkable event which will be less likely to be distorted by memories:
- "What have you found to be the most frustrating about [X]?"
- "What was the one time you found [X] to be highly satisficing?"
If you have many questions that really need answers, the nngroup advices to adopt a strategy of divide and conquer (see source below).
To create your survey, you can find valuable advice on uxmastery (source below). You might want to consider likert scale as it is easier to analyze results and less likely to bias answers.