pastel vector
I use the main hero 100% at S1, 30% at S2 and none at S3. When I see an opponent that uses the main hero, I consider his team as 4 hero team. Main hero should buffed with element mechanics through a mini-game. Player should choose 2 mechanics per season. For example... In lightning element, I have only 2 legos. Tharivol and Perkunte. While with Tharivol I have good epic dauntless and I can form a decent team, in thunderbolt I have nothing worthy. Aura and shadow too. If every season introduces 3 new mechanics with 30 new heroes, the possibility of formation of a good new team, goes smaller and smaller. And thus, one will always use the same heroes. While whales and krakens have no problem, low spenders like me would like to have more options.
I believe that the main hero should be "main" again...