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At this stage of development, balance in Heroes exists only in mirrored matchups, and even then with reservations; imbalances are also present. And all non-mirrored matchups, with roughly equal skill levels, come down to "who performs better."
Therefore, I don't worry too much about this. In my opinion, Jeb-Diamond differs from HLUSHKA in that it takes an average of 2 weeks to determine "who performs better" on them, while on HLUSHKA it takes 3-4 weeks.