I am not sure that it is reasonable to expect the Motability search to provide all the information expected by some apart from correction of some obvious errors.
It may be sensible to use the site purely to assess whether one’s short list of cars is available and at an acceptable cost.
Motability customers needs are surely focused on accessibility aspects, size, comfort, price, ease of use and the ability to carry any equipment.
Car looks, badge and performance are secondary to most customers.
I usually use the “inter-web” to find my short list by using.
Firstly AUTOMOBILEDIMENSION for size comparison of cars.
Then RIDC for detailed dimensions for access etc.
A search online for reviews.
Online manufacturers brochures.
And then Motability website for availability/cost.
Not convinced that the Motability site could be adapted to provide all this information in an intuitive and up to date form.