472kHz overnight

I ran WSPR on 472kHz overnight. It ran until about 0320am when the Win 7 PC decided to do updates and closed the PC. No new reports or reporters overnight, just stations that I had seen before or who had spotted me before. All rather disappointing. I feel that radically improving the antenna (and hence ERP) won't make a huge difference. On RX the system works very well and hears most active stations. To be honest, I am losing interest a bit in MF as there are far too few stations active especially here in  the UK.