It’s just seems strange to me. Hammond, Ashe and Torb can all build ultimate charge while their ultimates are active. These heroes have ultimate that create objects or obstacles that are very difficult to get around.
Hammond seems like an extreme case here, since his mines last 20 seconds, but he can begin building ultimate charge right away, with no delay.
B.O.B and Molten Core also do a very decent job at controlling space, and as a result, it makes it much easier for these Heroes to get a decent chunk of initial Ult charge right away from the enemy having to reposition.
Basically all I’m saying is that it seems like a major inconsistency issue.
I wish it was more consistent or at least they gave us their thinking process of allowing only certain Ults this feature.
Similar to the whole, channeled ults vs transformation ults and getting stunned out of only certain ones, i would like to see that distinction with ult charge during the ultimate.