I think there was always the potential, and even if you nerfed Sigma to the ground, you’d get a lot of Orisa/Rein usage.
That said, Orisa/Rein isn’t as nearly a strong combo, because if the attack range mismatch.
But personally, even choosing between
- MainTank Orisa, OffTank Sigma
- MainTank Orisa, MainTank Sigma, but both are weaker at close range
- Limiting the game to only 1 Barriertank per team
- Putting a rule that weakens 2 BarrierTank mid-game
I currently prefer option #2.
In particular, make barriertanks have lower HP, to give them that close range weakness.
But in trade they get strong barriers, and a bit more firepower.