I think I might have found a workaround solution for now!!! In the content browser pane: click the little eye that says “View Options” and uncheck "Real-Time Thumbnails."
I spent several minutes rapidly rolling my mouse over mesh/materials preview windows, while in a blueprint, and it hasn’t crashed yet! Normally, it would have crashed in <5 seconds of doing that. Nothing has changed, in terms of my laptop. Before unchecking that option, even while in 4.14.3, it would still crash every time.