And can we please have a way to initialize UE4 containers with a specified size via the constructor? Like std::vector. Means I can knock over that step in an initializer list and then memcopy into it, the use of which has greatly affected execution time when dealing with large data sets (10,000s of elements), and is part of why I have to end up with std::vector and TArray mixed in the same project 
I feel like the UE4 implementations are lacking some of these useful little features.