This was BEFORE EK/QR invasion into Scandinavia. This summer TG went down to 5 x weekly on both CPH and ARN routes - officially due to fleet re-configuration. Also... EK starts HKT directly from DXB in early winter and I guess counts on transit volumes from CPH...
Thai started flying CPH-HKT in Nov 2011, well
after EK/QR had begun CPH. This coming winter they are introducing ARN-HKT, so that means both CPH and ARN is 9x weekly from BKK...
These reductions you are mentioning was during 6 weeks in May and June so thats 12 roundtrips cancelled, I wouldn't call that significant...