I like what you are saying, it makes me think of the ODD parties message which although offering direct democracy comes across very liberal, which for a DD proponent means alienating the more conservative groups in society.
However I also kind of feel at this stage that shock marketing might be beneficial to a DD movement. DD is impartial, dispassionate, and when based on technology pretty nerdy, at least in these early stages. Selling DD on these attributes alone without wading into social issues makes for a pretty boring political campaign, and it is my opinion that most active voters are not motivated by boring, they react to and follow noise, demagogues, scandals, excitement.
There are groups who can be swayed by the intellectual arguments of DD, which is why you see a growing group of people supporting parties like Flux, these are rational people who believe in a democracy everyone should be considered and are prepared to accept the rule of the majority even if it goes against their own values. I am not convinced this group is large enough to bring a DD party into power, you might need to play on peoples political desires, or at least the desires of large blocs alienated by the existing system.
So for example if there is a large group of people opposed to a new coal mine being steam-rolled through government, you market DD as a method that could stop such a project. This will alienate all the people who support the project, but the costs vs benefits makes it worthwhile.
For a small party the hardest challenge is to be heard, talked about, if you try to identify which small parties were able to propel themselves into political power quickly, some that come to my mind are the Pirate parties in Europe, the alt-Right in UK, Europe, even Oz with Pauline Hanson, how do they get there? Often it is through saying scandalous, emotive things and channelling this to the media.
A political party needs exposure, that is its gold if the goal is to get elected, any exposure, you look at someone like Donald Trump who nobody considered would have a chance, but he kept saying things that were insane, and the media loved him, people know they would be entertained when they read about him so whenever his name was in a headline the media achieved views and as such the media gave him disproportionate exposure.
I feel a DD party could say anything it wanted to get the media reporting, once people are talking about it the movement can fall back on its idealistic nature and maybe a lot of people will be swayed then, at least more than if you quietly clogged along with an unexciting non-partisan message.