Sounds like a good idea in principle, but in reality design by committee never ends well. Just look at the consensus in every Kit thread here. You never get people agreeing.
Simple Red and White stripes
Black Pin Stripe
Central Red Stripe
Solid Arms
Too much Black
Stripes are too thin
Stripes are too thick
Why can't we have a central Badge?
Not enough Black
Hummel
Umbro
Adidas
Puma
Errea
Stupid to have a sponsor that you can't put on kids shirts
Technically, it's a Lancashire rose, because it's red
The Shield badge is better
Don't mess with the round badge
White numbers
Needs stripes on the arms
Stripes are too thin, makes it look pink
Solid back
There's a similar length list just about sponsors. You'd think 'build a website with options for each design feature, let the fans vote, we get what the fans want.' No, you get what some fans want. The same as if you'd not bothered.
Design is a tough gig. Small tweaks, for economic, aesthetic, practical, performance, supply, regulatory, colour conflict reasons can all snowball without careful curation. Like most things, it looks simple, and people only notice the 'mistakes' (to their mind) but overlook the 1000 things that went right to make it happen in the first place.