Those recent tweets aren't rumours. Those are wish lists.
Disagree. It needs at least one I/O port and one charging port. If they have to remove anything, remove the headphone jack and put a second USB-C port in its place (which would be both a charging port and an extra I/O port). For those wanting a headphone jack, they can pay the ten bucks for that little dongle. Courage! Or uncourage?
In fact, Apple even added that charging port to the iPad Pro... in the form of a port on the Magic Keyboard. People want it, that's why the iPad Pro got it, and that's why the MacBook Air has it.
Would it be the end of the world if the new MacBook came out with just one USB-C port? No, but it would still be damn annoying, and it would be enough to turn off some potential customers.
Whether you agree or disagree, I'm not saying Apple shouldn't add an extra port, I'm just saying it is not a deal breaker for most people who are looking for a lightweight silent macbook. However I'd very much welcome for Apple to remove the headphone jack and replace it with an additional USB-C port. The discussion whether or not the technology is available to do so is another discussion.