Optimizations to Object Creation?

We are currently using UE4.11 with no intention of upgrading to a newer version for our next project. We will instead use 4.11 and cherry-pick changes we want when possible.

With that in mind, are there any optimizations for UObject creation that have gone in since 4.11?

We are running into significant hitches in our UI when opening UMG Scenes which contain a significant number of Widgets (nothing insane, but definitely one of the more complex sets of widgets in our game). We are trying to reduce those hitches as much as possible.

Thanks!
Matt