When I started reading this article I had no idea that the author would state something that I’ve been saying all along. GE’s problem is not its size, but it’s diversity. With that said, I think that the leadership strategy of selling off parts of the company was the wrong approach and that they needed to put their efforts into aligning the businesses to the biggest possible degree ( I know, easier said than done), in order to make a more functional company. There is a good reason why there are only a handful of conglomerates left, so here you go, the biggest flaws of the conglomerate business model.
https://seekingalpha.com/article/4223599-will-general-electric-survive-turnaround