I do like the idea of emblems. Maxed heros keep growing at different directions. However, the huge gap between 1500 and 500 emblems to max 5 and 4 stars are obviously causing imbalance issues.
At current embelem drop rate, you can hardly find a 5 star pass level 4 while many 4 stars are close to maxed with 5 star stats. Everything about this game is designed around 5 stars, difficulty to get them, doing everything in the game in hope to get mats to level them. Now 4 stars can achieve anything your 5 stars can with emblems, maybe even better. The constant shed of edges of 5 star will make them irrelevant as well as the mats to level them. People will get bored with the game very soon as max and emblem 4 stars take very little effort, then they can do pretty much anything. Why waste your money doing summon?Why even bother hit titans anymore? You don’t even need that d blade or darts anymore.
From defense point of view, it doesn’t matter what defense you have, you can’t stay in top 100 for more than 20 minutes offline. Emblems definitely have the potential to make a big impact on defense, but the ridiculous amount needed to max a 5 star is making this years away. While many 4 stars will be maxed and people will realize, who needs 5 stars anymore? This game got nothing left to do.