That just doesn't seem enough to me. The WP is clearly not the greatest region, but it still has a lot of stuff very difficult elsewhere. Looking at his Madagascar itinerary, he'd be better cutting that totally and doing more in the WP.
It does seem overly short. Difficult to see how as a minimum, it would not justify from there Morocco for a day, Spain for a day, Turkey for three days & Finland with Norway for two days if he can.
Arjan starts off with New Year's Day in the Netherlands where he'll get several species that Noah did not see this year - perhaps Little Auk, Jack Snipe, Pink-footed Goose, Rock Pipit, Rough-legged Buzzard, Snow Bunting, Spotted Redshank, both Bean Geese, Bittern, Grey Partridge, Red-necked Grebe & Bewick's Swan.
Further in his two days in Israel, he will get most of the following that Noah will not see this year - Bar-tailed Lark, Blackstart, Crowned Sandgrouse, Egyptian Nightjar, Greater Hoopoe-Lark, Hooded Wheatear, Hume's Owl, Imperial Eagle, Levant Sparrowhawk, Macqueen's Bustard, Mourning Wheatear, Nubian Nightjar, Palestine Sunbird, Arabian Warbler, Sinai Rosefinch, Spotted Sandgrouse, Syrian Serin, Temminck's Lark, Thick-billed Lark, Tristram's Starling, White-eyed Gull & White-crowned Black Wheatear.
Noah did - Iceland (one day), Norway (four days), Turkey (four days), Spain (six days) & Germany (one day). (Iceland was cut short by travel problems and Germany was as a result of travel problems. From my armchair, he should have travelled more in Norway and gone north - too many misses there. He did exceptionally well in Turkey and he spent too long in Spain.)
Noah has seen all but 240 odd species on the WP List. Effectively you can strip out the seabirds, vagrants, Atlantic & Mediterranean Island species, Ural & Steppe species, limited range species & plastics and you get down to c120 true WP misses split 37 Northern species (highlighting the misses in the Norway leg), 23 Eastern European species, 8 Caucasian species, 24 North African species and 23 Israel targets.
All the best