I personally think normal return (enter) is better for creating new row and ctrl + enter does the multiline. At least that is how I am used to it, but I am not sure about others opinions.
One other thing is, can we have calendar option on the advanced setting for tables? I use a lot of date inputs, and currently I use text replacement, but if calendar can make it into the keyboard, it would be much better. Also would like to be able to alter the formatting (and set the default, that is what is shown when tapped once, not long pressed). I personally use dd/mm/yyyy formatting, but panda only gives d/m/yy option for this type.