It will no doubt lower your center of gravity and decrease grip. Not sure what rules you plan on running though. WKA does not allow a “laydown” seat anymore. Apparently it was ruining the manufacturer’s cup series as stated by some. The seat cannot have a continuous curve in the back. It must be flat and basically look like every other style sprint seat. Try to get around those rules somehow and their is even a maximum seat angle to the ground. I think around 47 degrees. Sorry to rain on the parade.
If their is no rule and you are struggling with too much side bite, hopping, or two wheeling, then give it a try. Some have a hard time adapting to sitting like that though.