I'm not convinced a Pro is coming. The "Pro" 3DS came out and was never really leveraged.
I wouldn't say that. There just weren't a lot of exclusive games for the New 3DS. But, there were plenty of games that offered improved performance and controls on it though. Poochy and Yoshi's Wooly World is an example, it's 60fps on New 3DS, while its 30 on Vanilla models. I think A Switch Pro is going to be more like the Xbox One X or PS4 Pro, where there won't be exclusives, but there will be improved frame-rates and resolutions on supported titles.