The blueprint changes caused my mineral requirements for a single ship to grow:
The actual requirements on the component BPOs went down slightly, but the Archon blueprint required a few extra components. Fortunately, mineral prices have been falling so the impact has only been around 15 million ISK. The factory costs in my quiet low sec system have had an impact, adding an additional 13 million ISK for the component and ship factory costs. So overall my costs have grown 28 million ISK per unit.
On the other hand, ship prices in my region have been steadily climbing with the last Archon I sold going for 1,395,000,000 ISK which I was quite pleased with, and gave me my highest profit margin yet since it was built with the old costs.
So right now I plan to continue operation as normal and keep my eye on the mineral prices, factory costs, and Archon prices.