If this isn’t currently possibly, I think it would be a good feature to allow multiple splitters per row and when a splitter is activated, it does not take up an entire row.
For example, Rows 3 and 4, have the same Input but different Outputs.
Row 3 - Input 1, Output 3
Row 4 - Input 1, Output 1/2
The first two blocks each row have different overdrive pedals and different amps.
Then Row 4 is combined with Row 3 into 2 block, 1 reverb, 1 delay.
From there Row 3 and 4 are split again, so that Row 3 can go to straight out to a real guitar amp without a Cab sim and Row 4 can go to a Cab sim for front of house / in ear monitors.