There are only two potential problems that I can see.
-Sometimes when you shift to the big chainring the chain actually goes a bit past the sprocket teeth for a few links before going on properly. You wouldn't normally notice it but it has caused some issues with our outboard timing chain drive. As to whether this is a problem would depend on the belt clearance and how tolerant it is of getting pushed a bit by the chain.
-Also the shifting of what will probably be non shimano chainrings and of odd sizes. With a mechanical system if it doesn't shift great you can finess it on with the lever. With electronic when you hit the button it is shifting immediately and if it doesn't want to do it there may be issues with servos etc. However you did mention that it seemed to be ok from a bit of playing around you have already done.