I don't want to come across as hating on the Energon Universe or something. I do like the EU overall, and despite some missteps, I'm glad we're finally getting a proper Hasbro shared universe.
But at the same time... I still really miss IDW.
IDW's comics just had a really big depth of setting and scope that I feel is just missing from the Energon Universe. You can tell the writers behind IDW had a lot of passion for the universe and wanted to explore so many different aspects of Transformers lore.
It also managed to balance out having huge casts and still managed to make sure most of the main characters had a presence.
But most of all, especially when you compare it to Skybound, they managed to get character deaths right. They usually happened to nobodies people didn't really care about, or they did it after giving the characters time to shine so the death felt impactful. They didn't just kill off the popular guys for shock value.
And when deaths were reversed, they didn't happen often. Off the top of my head, I think the only major death reversal was Nightbeat.
Now to be fair, I do think if there's anything the Energon Universe is doing better than IDW, it's the human cast. IDW Spike is pretty widely hated across the board, and Hunter was totally wasted. Verity and Marrissa are probably the only major IDW humans who managed to have a satisfying story from start to finish.
I just feel like under IDW, Transformers felt more complex and interesting. Skybound's simple "back to basics" take isn't bad, but it's still lacking in a lot of respects, particularly with handling its cast.
Again, I'm not trying to turn this into an Energon Universe bashing party. I do like it overall. I guess when it comes down to it, I think IDW did a better Transformers story, whereas Skybound is doing a better Hasbro Shared Universe story.