I've done some models for the game.
And that is the primary reason I'd love to have a trial version of this game released to everyone if you can do something like that, it means we get to try out the game, and figure out whether we like it BEFORE we invest our money into it, before buying games I love the ability to try it out before I buy, and if the option is there, I use it, however sadly now there aren't that many people that do things like this, meaning that I either have to take a dive in and say "Meh fuck it, I'll either like it or I'll have wasted my money".
I liked what Life is Feudal (for the final MMO release at least) had in mind concerning that:
you can download the game for free and play 24h on a tutorial island to get used to the mechanics. After that 24h all your progress will be deleted.
When you pay the game your character will be transported to the main island where you have access to everything.
That wouldn't be so bad for oKaM either:
Download the game for free, play against bots on a tutorial map and pay to unlock all the features.