The rules stipulate no way to randomize kingdoms at all. Full random with a maximum of two Events/Landmarks is great.
I read instructions on how to randomize in the rulebook. That what the randomizers are for, no? I also read something by Donald who said that Dominion is designed to be played with random boards. Of course I can house-rule whatever I want, but that beside the point.
I don't dispute that random +two Events/Landmarks is great. Full random with zero Events is also great. I also had fun Kingdoms with 1 Event. I don't actually know how it is with three or more, but I've yet to hear a valid argument why Making Fun or any randomizer app should not include the possibility when you play FULL RANDOM.
I can't really make a good comment on this because I'm not sure how the rulebook could have made a compromise recommending an 'official' format when technically Dominion doesn't have a lot of 'official' games that have to follow every rule to a T. I read the ruling as "you can do whatever you want, but you should probably limit it to 2," but I have the experience of mostly testing Adventures with a hard limit of 2, so I can understand someone thinking it's the other way around.
Hmm, I think it's pretty easy. The rulebook also states that there should be ten Kingdom cards unless otherwise specified, I don't see why you couldn't make the same limitations for events if they were intended.