Ask HN: Do I have a minimum viable product?

Hi HN, I got great feedback previously so I though I'd ask again:

I launched a web app for creative teams to collect and plan features of the products they are building. It's supposed to be a low-friction, easy-going tool for quickly getting the scope down, focusing on textual ideas / requirement.

The questions I have are:

1) Is this a problem a tool can help solve, or are you happy putting your ideas into Word / Excel and getting things done regardless?

2) Do you find my approach useful when designing YOUR products / services?

3) If so, what are you missing that would make the tool useful?

I just showcased my app at Mini Seedcamp Prague where I was a finalist, but the group was most VC-focused; I am interested in the opinion of fellow hackers and people "in the trenches".

Thanks!

URL: http://www.playground-hq.com