It's only mild when eaten at the wrong stage. I don't like mild mangoes myself. It took me several tastings before I found the sweet spot.
I think a lot of folks pan certain mangoes because they're eating them at the wrong stage. For example, I hear a lot of folks claiming that the nam doc mai is bland (just pure sweet). However, that's only true if eaten when fully yellow. If eaten at an earlier stage, it's actually an incredible mix of sweet and tart.
Maha Chanok tastes a lot like sweet tart when eaten at the right stage.
Carrie is another one that is compost fodder when eaten at the wrong stage, but quite delicious when eaten slightly green.
Drawbacks? Yes. It does not taste as good as a number of the new Zill varieties.
100% in agreement, we know taste is subjective. if someone likes mild mango this would be great for them. I like super sweet or super complex or both. Mild mangoes are not for me or my wife.