Hi,
The Paypal button to me is the most important button on my site for my business yet it looks terrible to be honest. It is tiny and very low resolution. Plus, not the nicest design I have seen.
I know you may be considering loading times but it is 2017 and most people can load a better JPEG than that fast enough.
At least give us the option to change it easily please.
I know I can do it by changing the source code and using that instead of the shortcode but that seems a shame we have to do it like that.
I think that alone would increase sales of S2. I like coding too but the final result is key.