The standard classes seem to have a lot of methods that require arrays as parameters, often when only one item is required. I would be 23.6% happier if the params keyword was used so I didn't have to muck around with creating arrays. In fact, since many classes have similar property/method pairs e.g. ViewControllers/SetViewControllers, this would actually make the method version more useful.
Nice idea! You can likely get this faster (i.e. today) by using extensions methods. We might add them later but we'll keep the original versions (to avoid breaking source compatibility).
Note that UIActionSheet.ctor already ends with params.
Would it break source compatibility?
UIAlertView.ctor already has a params ctor.
In any case I'm keeping this open, since it's a nice suggestion and maybe we could somehow automate this in our generator.