The question is: what is needed most? Everything has its advantages and downsides. If you want to give beginners and other people a clue how to use special features, you can make mini demos with an example how a feature is used. E.g. a demo for the new decals with lots of different approaches how to use them.

Otherwise, I think this is wasted time and doesn't show the real power of the engine. If someone makes a kick-ass interactive or non-interactive demo that blows you away (visuals, sounds, design, physics, etc.) you have something that is nice, but rather complicated to make and to pay for, too.