I love the idea.
My first thought is that once you have the platform, it would be easy to have "tiers" of proposals to look through.
There would of course be the full, ready proposals featured front and center; but you could also have a separate level for pre-proposals or small projects (<10 dash) that wouldn't make sense to have a full proposal for, but that could be evaluated in the same manner, by any masternodes that have spare time/attention from the "big" projects.
You could remove the 10% voting threshold requirement, and have the projects funded by a sub-dao fund that has a normal, recurring proposal to get funding, but that disperses the funds without having the same requirements for a proposal fee.
Like you mentioned, it could function like kickstarter where all these "mini-proposals" are sorted by category, and masternodes could drop in and evaluate whatever category they feel like they are qualified to evaluate and have the time/attention for.
It would solve a lot of the problems people are complaining about in terms of the high proposal fee, without swamping the masternodes with a deluge of tiny proposals to sort through if they only want to evaluate the "important" ones.