I was testing things in training and found out if you have both the joycons facing outwards and then do a grab, your grab in game is now bigger!
This'll be very useful for covering some horizontal grab distance, in which a normal grab would've almost hit its mark.

Depending on your distance, this also makes it more clear that you're going for a grab, and is easier to hit. Bigger isn't always better for certain situations, but you now have a new option to use!

This videos is just to show off how big your grab can get,
I wouldn't actually recommend doing this grab from this distance!

Only time will tell if this will be useful or not worth doing.
Could be useful somewhere.