You can adjust button height with spacers between boards. Of course you can use any button sizes an colors,
this button height is hard explainable (etc. my distributor have only this height with 1N switch force) but on real device is very interesting, of course in any height nobody can say that keyboard is comfortable. but 1N force version is very soft and easy to press.
One bad is, every color have different switching force.
Please understand this is only technology preview no new fashion line and all keyboard is only for short writing.