Powerful people can be written well. Its a fallacy that most think different. Look at Ostranders Spectre. You don't get much more powerful than him, but it was well done.
The key imo, is to show what they can do, but let their foes be something that stumps them. Like Superman would be lost if he had to deal with someone that can't be handled physically. Not because they were too far up the chain to hurt, but they simply were unaffected on ALL levels by brutes. And not some cheap, my soul is pure so i win manuever. Writers need to put more effort into their writing, rather than making it predictable.
And character development is always a good flipside to battles.