Since the FTDI is a break-out board you're putting on pin headers, I'd have a cap near that header. (Unless I've misunderstood something)

There are a ton of articles and discussion on the topic capacitors. Here's one:
Decoupling or Bypass Capacitors, Why?
It might not be necessary, but it would be hard to add at a later time.
You have one header named switches. How do you handle Switch Bounce?

 

Since the FTDI is a break-out board you're putting on pin headers, I'd have a cap near that header. (Unless I've misunderstood something)

The FTDI Pins are used for the FTDI breakout to program the uC, so yes I suppose you're correct in that sense.

You have one header named switches. How do you handle Switch Bounce?

That will be handled through software De-Bounce.

Thank you for the link, I shall have a read of that