@hiddenlight: Although Darkseid already showed that fighting the League was no problem. GL wasn't a threat at all, neither was Batman. Flash was taken out by AoE attacks and had to run to just keep the Omega Beams away. The OB oneshot Superman, and would almost certainly do the same to Wonder Woman and Aquaman. The only real threat was the two magical weapons that Aquaman and Wonder Woman had, but even when he got his eyes gouged out by them it didn't really slow Darkseid down. Plus, Darkseid can mass scatter a planet if he gets angry enough, most of the League isn't surviving that.
His eyes where fine you can see that there unharmed in later panels and in the villain issue he was fine after he had the boom tube collapse on him, he only ever got his eye's gouged out in the movie.
We've been given the reason he hasn't gone back in the 5 year gap and it's because he made a deal with Highfather that he would be allowed free reign in the Earth 2 universe if he left others alone.
His best trait at the moment seems to be his durability, he wasn't affected by Mr Terrifics Boom spheres which are suppose to bypass durability by teleporting away the flesh it touches. Worlds end Mr Terrific could easily solo a lot of high end teams given that upgrade and his ability to bring in countless T-spheres from across dimensions.