well I can't comment on the newspaper article as I don't speak Icelandic. However all iceland express aircraft are operated by AEU on the AEU AOC, so I suspect they will be using AEU aircraft again, just like they were this morning and will be tomorrow.
There is alot of politics in iceland between IEX and Icelandair, the latter not liking their toes being trodden on, so perhaps there is some underlying stirring going on here