Higher chances for better heroes with higher Summoner Level

There should be a way to get higher star heroes as you rank up your Summoner Level. I continue to get 1 and 2 star heroes which do nothing to help as I move through Story Quests and prevent my ability to move past Heroic level Event Quests. There should an increased chance of getting 4 star heroes in the daily crystals, more chances to get 4+ star heroes in the Premium Crystals and more ways to get 4, 5 and 6 star crystal shards via the daily login calendars, special event quests, etc. It gets very annoying and frustrating to continually get 1 or 2 star heroes that ultimately will get sold bc I have no use for them except in certain versus arenas (which I basically avoid playing due to the lower rewards) or repeatedly getting 3 star heroes that I really only use during versus matches with the exception of my highly upgraded ones which I'll use in Alliance Events. I would suggest removing the chance of getting a 1 star hero after completing Act 1, removing 2 star heroes after Act 2, etc. It is impossible to continue through Story Quests or attempt Event Quests higher than Master level when the probability of getting better heroes is slim to none. Making the rewards better as you continue to rank up would make for much happier players!
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Another thing you can do is grind some arena. Get more shards so you can get more opportunities to get better champions.
And I would recommend that you don't sell champions. Duplicating a champion gets you more shards, more iso, and more points in arena, and those are really important for progression.
And if I recall correctly, you don't get 1* champs from the daily crystals after a while. Progression titles = better login crystals = better rewards.