There's no clear distinction between the options you need to, say, simply recursively slurp down a website (i.e. the most common use case by a country mile) and the options you need to do the HTTP equivalent of standing on one's head whilst whistling Dixie.
Simply glopping all the available wget switches into one vast dialogue isn't the answer.
Some sitting down and thinking about what people actually do with wget would instantly improve it.
If you address that one simple case - recursively download a website - you could improve the user experience for 90% of users at a stroke.