Sorry I haven't been here for a while, just busy & sick.
I've never had issues with any transmission shifting from 2nd to 3rd, missing gears or grinding, but it sounds like with at least, the Pro5, that the adjustment they have it's almost imoossible to miss a gear. And, if you use just your open palm, and not ball grabbing, you push straight up and it will go into 3rd. If that's true, that alone would be worth it.
I'll have to check if the top 5 shifters also have that provision built in ?