Re: The Falcon
The reason they aren't giving him bird telepathy? Well, a couple come to mind, but the number one is that its kludge-y. So, you've got a character who randomly has the ability to talk to birds. . . and also has a flying harness? The two are completely unrelated abilities, and would come off as an arbitrary theme rather than a coherent character concept. Doubly so when you presumably are adding "high end skill set" on top of that.
Combine that with how "avian telepathy" would be very easy to mock ( well, unless you use it in ways that are both alien to Falcon as he's usually portrayed, and would clash with the style of the movie ), and you have a problem.