I don't think so. They would have retreated back to the ridge, where the Union guns were firing effectively down the draw. They could have held up the advance there, with a combination of entrenched musket and cannon fire, if the Union guns were diverted to the flank. That would have bought enough time for the boys in blue to beat a hasty retreat and avoid being captured or decimated by the Confederates. They could have retreated across the river the same way Lee did, and lived to fight another day.
the peace would have been much more equitable.
At the risk of igniting the war all over again, what was so inequitable about the peace? The destruction of the South came as a byproduct of the war, not the armistice.
The tree line was much different in 1863. Not positive, but due to farming, I believe there were not nearly as many trees in and around the battlefield as there are today. The Cornfeds may have been able to fire cannon directly down the rest of the Union line, while they were similarly engaged to the front, and attacking down the flank once again. Lee's ultimate goal was to take Washington and sue for peace. Had he won at Gettysburg, and routed the Union army once again, as he did at Chancellorsville a month earlier, well, who knows. A Twilight Zone episode?
Speculation on my part or course.
Have read that book by Newt Gingrich? I herd it was good book