"Export As" Suffix Checkbox and Artboard/Export Feature Requests

Can someone explain to me the function of the Suffix checkbox when you use Export As from Illustrator (on Windows 10)? It has no impact on file names whether or not you check it because I can't see any way to actually enter a suffix unless you select Export for Screens instead of Export As. Or am I missing somewhere else you can enter a suffix before then choosing Export As?

Furthermore, can Adobe please:

1) Add a feature where you can reset your artboard names automatically? I often end up with, for example, "Artboard 16 copy 8" etc etc at the end of my process, and I'd like to be able to reset them all to "Artboard 1" to "Artboard 18" (or however many artboards there are) without having to do so manually, just based on the order they're in. 

2) Add another feature on Export As where you can choose whether or not Illustrator uses your artboard names at the end (which is what I would have assumed the Suffix checkbox did, but it doesn't). As far as I can tell, if you don't edit your artboard names, your PNGs/JPGs will just export with "-01" etc on the end (even if the artboard is called "Artboard 16 copy 8") - fine, but if you rename an artboard at any stage, it automatically puts the name on the end instead of the number. I'd like to be able to choose whether or not I want to use the artboard names, if I rename them (or even better, use the numbers followed by the artboard names).