Customize a key (feature request) - OR - Replace the Comma(,) key with Question Mark (?)

 Hi,

I've been using Swiftkey for years now, having tried many many alternatives and finding it far superior than other options.

The only thing that is missing is the option to customize a key. For example, replace a symbol with another.

I have almost no use for the comma(,) and I use the question mark(?) all the time and the question mark needs two presses which is annoying, and really slows typing.

I am guessing Swiftkey has statistics of people's keypresses, they can check frequency. My guess is most people use the question mark a lot more than the comma, so why not make it default instead of the comma (if not adding the customize feature).

Many thanks for the best keyboard.