I used to work on Corel and some other visual design softwares some years ago and I really miss the customizable hotkeys during my workflow. It would be SO much more comfortable inside the Blueprints Editor to have one hand in the mouse and another in the keyboard, all the time. The less we have to type, the better.
About lag issues I have to reinforce that I share the e.x.a.c.t same situations as mentioned above.
As I see, imho, all of his suggestions (without exceptions) sound as improvements for devs in general, and not an exclusive personal preference.
Thumbs up! Really liked the suggestions, specially the hotkeys improvement. Looking forward to Epic’s manifest here 
And thanks for the feedback, Yun!