For the time being I will probably use the HTTP request node to do batch updates, but it would be super useful to be able to have this available/integrated. I love how the Baserow node already shows table name, etc compared to having to find a table ID to copy and paste like some other nodes.
This might be messy, but it worked for me.
I used a Set parameter to set the json so the field name match.
The I used the Split Items to actually Aggregate them into one Json array
And then I just posted to the API from the Baserow docs with batch enabled.
Inserting 106 rows via Baserow node (original) took approximately 30 seconds to complete
The same 106 rows via the batch insert took under 1 second to complete.