Your current ocean current map is off in a few place. Most noticeably were Arabia and zeelandia would be. Without those right the whole map will be off.
Here is a map of an alternate Earth that I've been building and rebuilding for years:
OMVbI.jpg
Map by Mikael Asikainen
To make things easier on all of us, myself included especially, at the bottom left is a legend on this world's elevation. The differences become most apparent when comparing this map to our map, with the blank made from the map by the DeviantArtist Concavenator:
QyVGQ.jpg
Note that the Old World in the alternate Earth is further eastward than ours, and Australia is closer to Antarctica, and that Greenland has been rearranged to the extent that Mont Forel, its highest point, is the North Pole. Presented below is how Asikainen interpreted how these geographical differences affected the ocean currents:
Zg6Tk.jpg
And now here is how "SealBoi" imagined how the differences would affect the overall climate:
14lGj.jpg
The legend in the map is as follows:
Red - hot desert, e.g. Sahara
Orange - hot/semi-arid steppe, e.g. Sahel
Light-ish blue (in the tropics) - savannah, e.g. Serengeti
Cyan-ish - tropical monsoon forest, e.g. Western Ghats
Dark blue - tropical rainforest, e.g. Amazon
Yellow-green - humid subtropical, e.g. Florida
Very pale green - humid subtropical, but drier, e.g. Northern India
Darker green (usually near previous) - like previous, but colder, e.g. Hengduan Mountains
Bright, "normal" green - temperate oceanic, e.g. Ireland
Dark green (see Tasmania) - subpolar oceanic, e.g. coastal Iceland
Pink - cold desert, e.g. Gobi
Pale orange - cold steppe, e.g. Great Plains
Bright yellow - Mediterranean, e.g. Greece
Darker yellow - the previous, but colder, e.g. Ethiopian Highlands
Light blue (in the temperate zone) - humid continental, e.g. Poland
Very light blue - that, but warmer - e.g. Iowa
Dark blue-green - subarctic/taiga, e.g. Siberia
Pale-ish purple - continental but drier, high-altitude counterpart to Mediterranean, e.g. Zagros Mountains
Dark purple - subarctic but with dry summers, rare, e.g. Brooks Range
Pale grey - tundra, e.g. Arctic Archipelago
Dark grey - ice cap, e.g. Antarctica
So using the provided information above, I ask you this one question--is the climate map, in any way, accurate?
Your current ocean current map is off in a few place. Most noticeably were Arabia and zeelandia would be. Without those right the whole map will be off.