What happens to an interface when there’s too many cooks in the kitchen. Let’s face it, when you work in house everyone on a project has an agenda. Marketing, tech, ad sales, everyone has their own set of demands they want met. This is why I believe any site with a lot of stakeholders absolutely must have some kind of advocate for the user to ground everyone else.

I completely agree with the blog - “About forms: messing up the interface”. Too much input can be as negative as having none at all. With so many different opinions, it’s hard to know how much is overkill. Designing a contact form as mentioned - this is a prime example of how a design can start off as something extremely simple but then is modified to suit the needs of another and so on. As a designer, I feel this happens on a regular basis. You can have no outside influences and have a very simplified design which is lacking certain elements, but then you can also have a website design that has been over-designed til it’s not even worth showing to a client.
There needs to be a balance in all sorts of the matter. It is important to take into account your target audience and feedback from your colleagues. To achieve a truly unique and innovative design, you must strike up a balance between what is functional and what is too much.