Glad to hear it’s working out well for you so far!
Going to also +1 the editor events being something we will focus on, as we add additional editor subsystems. Right now, you can already hook into importing events, using the Import Subsystem!
We also will have more editor-like widgets, like single property displays and details panels. Drag and drop is still an area we’re working on, but you can create drag and drop events with Blueprints inside Editor Utility Widgets even in 4.22.