Is there a need for such a tournament?

Yes, let's wait and schedule it between "Golem Master" and stage 5 of the World Championship, as there will be a suitable time slot. And tournaments focused on leveling up already have their fans, and I think if the map is versatile and interesting, the tournament will be a success.
Here's a suggestion: maybe we can jointly create a schedule for official Heroes 5 tournaments, so that official tournaments don't overlap with fan tournaments, and fan tournaments don't suffer from low participation rates as a result. This way, potential organizers can see that a tournament shouldn't be planned for a specific time because another official tournament will be taking place.