And remove the pinnacle grind altogether while you are at it. The normal version of heist battlegrounds uses this feature and it works fine.
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How about they remove the tiers for pinnacles and powerful engrams. I mean it's annoying that some pinnacles are only a +1 while others are a +2, especially since all pinnacles requires lots of grind. Powerfuls are similar with their +1, +2, +3. Just make all pinnacles +2 and all powerfuls +3.