I am a new user to FormsContral so I may be looking over some things but here's what I've noticed so far...
I think FormsCentral is pretty cool and I like the look and the professional feel. It's great for my business. It's just I'm really surprised that these basic three things haven't been done yet.
Thanks for your feedback! FormsCentral doesn't support Chinese locale, but you can create forms with Chinese text. If you don't mind date/time/currency formats or the submit button in English text, the form works well with Chinese text and Chinese responses.
As for phone number field or dropdown with countries, they are not currently provided by FormsCentral. Please vote on an existing idea or add a new one if you cannot find one at http://forums.adobe.com/community/formscentral?view=idea. The higher the vote of a feature, the more likely it will be implemented in the future.