Hey Juraj,
I think Kentico should definitely reconsider this decision. We have several clients that have a paid version of Kentico, but use the free edition for tiny microsites. It is a massive drawback for them if there is now no possibility of a microsite without paying for a full license for what might just be a website with a few pages.
I have a client we are working with now that are about to go down this route, so to suddenly learn this has been discontinued will mean we have to change tack.