Welcome to TI. I can't wait to see a picture of the crank. I consider it a miracle for the crank to survive while two of the main bearings sustained damage. I suspect the bearings didn't spin, just had contamination. But even in this case, the crank journals should have been scratched at the very least.
The car will run with P28 ECU, however w/o a proper tune you'll be running even lean or reach depending on whether the pistons are low or high compression. Once you boost it, definitely do a tune using Hondata. That way you'll be able to datalog everything. If you blow it up later, you would at least get some clues to why it happened and make necessary adjustments/replacements to save the next engine. Something I wish I did few years ago.