I believe that for a long time HotS has needed some substantial changes in their role system, both for clarity for the userbase and function in the matchmaker. Many players simply don't have the information in front of them that will allow them to make the appropriate decisions in the game. A shift of roles would provide that information, while changing nothing that knowledgeable players already take for granted. I believe these roles will also provide more nuance for matchmaker systems like QM and "aram" style maps, which will allow for more interesting and balanced games on a more casual level too.I also feel that "burst" and "sustained" are not necessary role markers as they describe broader damage styles that can be covered by multiple roles. It may be useful to have "burst" and "sustained" tags which inform the matchmaker but I'm not decided on if that's necessary.I wish to divide the role system into the following roles, with the following explanation/criteria:​​​​​​​Ambushes their opponent and tries to secure a quick kill.Specialises in ability damage.Specialises in attack damage.Tough frontline hero built for damage and disruption.Survivable frontline hero who engages fights, protects their teammates, and isolates targets.Approaches the battleground in a unique way.Specialises in pushing lanes and making objective pushes harder to deal with.Utility heroes, focused on enabling their teammates.Specialises in healing the damage their teammates take.Here is a list of heroes I would propose be placed into each role, for clarity for the reader. I know a few of these roles for a couple are debatable, the purpose here is for illustration so corrections are welcome, but ultimately these ideas are not set in stone.Alarak, Genji, Kerrigan, Nova, Samuro, The Butcher, Valeera, ZeratulChromie, Gall, Gul'dan, Jaina, Kael'thas, Kel'thuzad, Li Ming, Probius: Cassia, Greymane, Illidan, Falstad, Lunara, Raynor, Sgt. Hammer, Tracer, Tychus, Valla, Zul'jin: Artanis, Chen, Cho, D.Va, Dehaka, Leoric, Malthael, Ragnaros, Rexxar, Sonya, Thrall, Varian (Twin Blades, Colossus Smash): Anub'arak, Arthas, Diablo, ETC, Garrosh, Johanna, Muradin, Stitches, Tyrael, Varian (Taunt)Abathur, Murky, The Lost Vikings: Azmodan, Gazlowe, Nazeebo, Sylvanas, Xul, Zagara: Ana, Brightwing, Li Li, Medivh, Tassadar, Tyrande, Zarya: Auriel, Kharazim, Lt. Morales, Lucio, Malfurion, Stukov, UtherThat is all for my ideas for now, if you have any suggestions I'd like to hear them. Thanks!