The SOTU needs an overhaul, but I thought it was Constitutionally mandated that "the President shall report to Congress on the state of the union" or something like that.
No doubt, the Framers thought that an assessment of the state of the union was in order. Article 2 section 3 states the following:
"He shall from time to time give to the Congress information of the state of the union, and recommend to their consideration such measures as he shall judge necessary and expedient; he may, on extraordinary occasions, convene both Houses, or either of them, and in case of disagreement between them, with respect to the time of adjournment, he may adjourn them to such time as he shall think proper; he shall receive ambassadors and other public ministers; he shall take care that the laws be faithfully executed, and shall commission all the officers of the United States."
That does not strike me as the equivalent of what the modern presidents do. I respectfully submit that a serious originalist president could refuse the whole pomp/circumstance affair altogether. This, in fact, is what Jefferson did, and his rather under-the-radar tradition was maintained for at least a century.