First of all i want to say that the small map doesn't look bad , but i think you should fix some things. As previously mentioned to Kab, before posting I've talked a bit with the other blue guys to understand their opinion about this map. We come up with some suggestions, but i'm going to post only what i think needs to be changed to make this map perfectly playable:
Colorblind Issues
Kingdom of Italy has almost the same color of Naples and Sicily (look
this image for reference)
A bit less than the previous one but also Bessarabbia color could create some confusion (try a lighter green for russia?)
Space
Some parts are cluttered, the northern part of Europe is better, but i think that Incandenza was referring to something like this as result:

I did it in a couple of minutes without the layers, so you should fix this in seconds

Also the english channel is bit a mess, i'd suggest to move all the British Isles a bit to north (no one will notice the difference), maybe removing/editing a bit the english/french borders. In this way you can make some free space to fit better the boulogne circle and to do easier/clearer connections.
The example is not perfect but can give you an idea:
Legend
This could be a personal preference, but did you try a different font for the legend? (only on the small map).
The current one is very nice (graphically speaking) wi but is not the best userfriendly choice, since it's a bit hard to read with all those embellishments.
Abbreviation List
Another small thing to fix is the abbreviation list on the left:
OL doesn't look aligned with the others abbreviations on the list and Sx should be moved up to have the same space between the lines and not to have the name overlapped with west prussia.
The two black lines the makes a right angle at the top of the list are necessary?
Can you make a bit more noticeable the small diagonal lines on the Orient brown border?
A question, it's possible to reduce a bit the sword icon? Just asking , don't do it if it looks bad
An advice: if you need more space, you should consider to remove the non playable islands on the map (example cyprus and crete)
Personally i hate where the one way connection from gibraltar to malta disappears behind the legend but it's just a personal preference since nobody else dislike it.
Apart from the above, I don't see other things that must be changed.
Go guys! It's the last climb
Nobodies