The map does not include vassals, and Venice does not exist
. The Italian vassals are neutral, and Venetia is on Nikephoros' side but is extending feelers to Andreas Angelos.
Some sections are near complete entirely, but all of the walls are up at least to a third of their planned height/width, with 50% total progress towards completing the thing. Keep in mind that Constantinople has quite a large labor pool that can make a lot of dirt fly on short notice.
Rhomania in 2012 will most likely look like the Kaiserreich, in the sense of having both a strong monarch and legislature at the same time. I'm envisioning constitutional monarchies ITTL not meaning what they do IOTL, a monarch who is merely a figurehead, but having the literal meaning of a monarch+constitution. The exact distribution of powers would vary from country to country, but it'd be much closer to an even distribution, rather than the very lopsided OTL ratio.
Having the Empire remain absolutionist (de facto, although it could be de jure) permanently doesn't seem feasible. People like power, and will try to muscle in on monarchial prerogatives, and a monarch who is personally weak can't stop them. And strong Roman monarchs for 500 years straight is ASB.
One possible issue to resolve the 'need to remove bad emperor without coup/civil war' could be the concept of retirement. In my original draft Andreas Niketas lived into his 90s, but in his mid 70s retired. He retained all the ceremonial trappings of being an Emperor but his heir had all the power. If something like that became a tradition, perhaps bad emperors could be retired on grounds of incompetence rather than the original factor of age. The concept of co-emperorship is perfect for this. Obviously one issue with this is that it requires a heir to fill the slot of the retiree.
Free speech is more difficult, since no monarch is going to tolerate lese-majesty. Now something like a free speech edict that says you can say whatever you want, so long as you don't 1) advocate treason 2) insult the Emperor
as a person (meaning you can say, Act 42 is stupid, but not the Emperor who wrote it is stupid) and 3) threaten the life of the Imperial family. That'd provide a good pressure release valve, although the fuzziness of #2 could definitely be an issue.
Democracy and nationalism are two hot-button topics, and I certainly don't want them to appear just like OTL with only cosmetic differences. I've given more thought to nationalism than democracy, but I do plan for the concept of the nation-state to be much less in vogue. Possibly viewed as the option of ethnicities too annoying/stupid to get along with others, whilst civilized people form Federal Empires.
Democracy is more thorny since I don't see de facto absolutionism as sustainable (all it takes is one idiot monarch to break the system). But at the same time having everybody go republican with maybe a figurehead monarch I find both lazy and boring since it's a copy of OTL, just with different borders. Having Kaiserreichs being a viable modern government I think is a good compromise.
Roman nationalism at this point isn't saying 'I'm a Roman', it's saying 'You're not a Roman, so bugger off.'
Rhomania doesn't need a French Revolution to become a constitutional monarchy, but the only way it would
pioneer OTL democracy would be a Revolution.
The Vlachs, Russians, and Georgians were only able to contest the Romans because 40% of the Imperial Navy defected to Venera/Alexios, and even then the Allied and Nikephorean fleets were evenly matched. Odessos could've gone either way, but went to the Allies. Even so, the Imperial fleet and Roman mariners are making it impossible for the Allies to secure the Black Sea, which is why the Army of the North is having such supply troubles.
If just 6-10 less ships had defected, Nikephoros would control the Black Sea.
About Roman capital ships, keeping in mind that that section is non-canon, I can't see Rhomania settling for less than an Italian level battleline. It's got a lot of coast, and nearly all of its major cities are on the coast. If you add overseas colonies, the need for a large fleet grows.