I just had a look at your oceans, as I have some knowledge with them....
- I'm in no way saying that these edits are 100%. Its a best guess situation after a brief look :) If you spot anything funky, I probably missed something or forgot some fact
- the arrows are pretty badly drawn as I was using my laptop mousepad and the buttons are acting up at the moment
- I didn't know your bathymetry and where you have any upwelling/downwelling so I made a best guess of what I thought made sense.
- I haven't looked at the climate biomes as these will change depending on what changes you incorporate from my ocean map.
It was pretty good. You had most of the correct features.
Just a heads up. Currents don't generally just separate at 90 degrees for no reason. It has to have some sort of hydrodynamic flow or bathymetry feature driving the splitting and merging of currents.
I noticed a couple of your currents where going through the archipelagos instead of along the side of them. While currents can traverse across them, the shallower bathymetry acts as more of a barrier to faster established currents.
I didn't think your long east to southwest warm current in the southern hemisphere were so connected. That's a long way for a warm current to travel through many interfering islands. Warm currents are normally slower and more likely to spread out when it hits a barrier.
I also added a couple smaller counter currents.
Just a note. I recall that circumpolar currents (polar currents that flow 360 degrees without land interference like you have in the south), allow for the currents to be colder and more established (with less mixing). Your northern "arctic" current is going to be warmer than your southern current as it will have more chance of mixing with the warmer currents around it. The land on either side sort of acts like a giant mixing bowl. This will impact on your climate zones along the coastal regions in the north (it also impacts on the development of the hadley/ferrel/polar cell atmospheric circulation system, if you want to go really in depth). Something to take into consideration.
- yellow are my warm current edits and green are the cold current edits.
- those with green or yellow crosses are more cooler/warmer currents respectively.
- black cross is a current I didn't think belonged there but if there is some bathymetry feature i'm not aware of...