Mushroom you are conflating being a Roguelike with being complex and fun. Those are three different scoring criteria. It might be that your personal view is that a roguelike must be complex and fun. That's cool. Nothing wrong with that.
But in the scoring we use getting a high 'Roguelike' score is no measure of quality, fun or complexity at all. Roguelikeness is in the eye of the beholder.
In your personal view:
1 point. Not really a roguelike.
2 points. Hybrid or Roguelike-like.
3 points. Very much like Rogue.
Sort of granular, and that's only one of the many criteria.
The other's are fun and scope (complexity) you've already mentioned, and then there is completeness (bug free?), aesthetics and innovation.
I tend to shoot for fun and innovation.
On this forum we are all fans of the genre, but I would hazard to guess that most of us don't list a roguelike are our favorite game of all time. I know I don't. I just like to design Roguelikes, they are fascinating and doable with minimal resources. I can make a cool one all by myself, that's awesome. I can chat with other devs, other hobbiests.
The competition was started to show you can make a minimal sized roguelike quickly. Being a great big huge monster was not necessary, a roguelike could be small and quick to make and not be in constant development for years on end, and still be fun (or at least playable lol!).
Still it's an RL competition, not a general competition, so we keep the Roguelike criteria as one of the 6 scores. Believe me it causes no end to internal debate among the reviewers each year, it's the most controversial scoring criteria.
You should join this year Mushroom. It's a blast. Or maybe do some reviews, we can always use more reviewers.