Thank you so much for such a fun adventure! In addition to the extensive questing, I think my favorite component of this journey has been the massive amount of rewarding exploration this pack brings. It challenges the player to ask "what's around this corner?" It's little wonder why you won an award!
What little criticism I have isn't well documented since I was too busy having fun. I ended up stuck in progression and ended up finding solutions to get what I needed which were quests later though. It's far from a big issue, and user error is always a possibility probability. I think this happened regarding the fusion reactor where I just flat out crafted the plans to get the necessary elements to finish the quest that rewarded said plans. Not a fan of of the extra mobs, and I felt my fun drain out a bit probably around the jungle wood area and eventually corrupted cell. Sure, it rewards the player buffing up appropriately but it felt like I was wading through the masses like a Warhammer 40k novel. I can safely say that my distaste for spiders has only increased tenfold since playing Material Energy, and I fear for the souls of any spiders I see crawling around the house.
Best of luck with Material Energy^4, I'm sure it will be excellent!