You are missing the whole point of this thread. This about the Wedding at Sea pricing, not the cost of the cruise fare. The Wedding at Sea is separate from any cruise fare that Princess might charge, depending upon ship, itiinerary, cabin class, length of cruise....et al. Happy Anniversary, but your cruise booking does not include the Renewal of Vows that Princess is offering, and if you are not interested in that sort of thing, that is fine, your choice. Some cruisers might be. That would be their choice.
I am referring to the cost of our wedding almost 20 years, on board a Princess ship, and the cost of the wedding package at that time. The price increase is rather modest by comparison.