Caj if you think making a computer kneel defines a good game engine then you are sorely mistaken. If that was the case Real Virtuality 3, used for Arma 2, would be the best engine of all time (and it REALLY isn't). Also, I am pretty sure Crytek made it their mission, riding on some sort of hype-wave, to have Crysis make PCs struggle, so they could say they had the best graphics ever (and the graphics were very good, but it kinda stopped there). There are rumors about them putting water under the ground in different zones just so it would have to be rendered in in the background, making the PC kneel because "the graphics were so good".
Fallout 4 is an excellent example here, seeing as the graphics are not great. They focused on other stuff, and the world is so large and there are so many objects and details in it that if they were to develop it to an insane standard of graphics, it would require an equally insane effort. Not to mention it would make the game way too big and demanding for consoles and PC. Bet it was developed for console in the first place, which means they had to tone the graphics down initially. In their case it's a little different though, because the community will probably release new texture packs for them, so that anyone who wants to sacrifice another 60 GBs of space can play it in full glory.
I totally agree that all over, the Frostbite engine is a step ahead right now. Of course, Battlefield 4 was so full of bugs it literally made me crazy at times, but consider its achievements. 64 players on relatively large maps, enabled for water, land and air vehicles, destruction, bullet registration over large distances with bullet drop. Just tons of shit. The stuff they had to pull off was perhaps the most DEMANDING task to ever ask of a game engine. It was released prematurely ofc, but now it's pretty good. I also know that Frostbite is pretty user friendly and easy to work with.