With more German influence and without UK to see as counterweight I don't see them joining, especially considering how hard it was in OTL to gain support and problems concerning German property claims that accompanied the expansion, and the pro-Russian German stance that alienates much of Eastern Europe EU members to Germany.
German property claims are a trivial problem, since the German leadership and the overwhelming majority of the German public are utterly uninterested about them. However, I concede that the pro-Russian attitude of France, Germany, and Italy (since Paris and Rome are not really different from Berlin about this) may be a problem.
Also with Franco-German axis being more dominant I believe USA would try to invest more into potential allies and try to form a counterblock.
Only reason for the USA to do this is if they are having a phase much like the Iraq War and want to organize a more loyal bloc in Europe to support their adventures elsewhere, or have a definite falling out with Russia and face a relapse into Cold War. Otherwise, it makes little sense, for them the EF bloc is just as good a strategic partner.
European Federation-France, Germany, Italy, Austria, Belgium, Croatia. State-like federation with socialist bent aligned to Russia under political influence of Germany and France. Centralised and beaurocratic, with reliance on African and Arabic migrants as cheap labour.
The idea that the EF is going to be really lenient on African and Arabic immigration is politically ASB and shows utter ignorance of the strongly negative feelings in the last few decades about such unregulated immigration in countries like France, Germany, Spain, and Italy. Also, where goes Croatia so goes Slovenia and vice-versa. Moreover, the lack of Spain, Portugal, Luxemburg, Netherlands in the EF is even more politically and economically ASB. Spain and Netherlands have been amongst the most steadfast supporters of European integration and are tightly linked with the economies of France, Germany, and Italy. Greece is almost surely a member of the EF, too. Malta, Cyprus, Romania, and Bulgaria are other very likely members.
European Commonwealth of Nations-UK, Norway, Sweden, Finland, Denmark, Poland, Lithuania, Latvia, Estonia, Czech Republic, Slovakia.
An free trade and defence pact closely aligned to USA with free movement but seperate internal and foreign policies for each member, however largely liberal in terms of economic philosophy. Largely restrictive to unregulated immigration.
It is much, much, much more realistic to switch the attitudes of the two blocs about immigration, if any, or say that they have more or less the same restrictive attitude. Also, the ECN is going to include Ireland, because of Ulster.
Contested-Spain which probably would be fought over by both sides with support of USA just as Netherlands.
Utterly ASB in both cases. Political and economic links, as well as attitude towards European integration, make both countries sure members of the EF, as well as Portugal and Luxemburg.
I suspected that with time, ineffective and chest thumping political decisions of EuFed's in the area of economy and immigration would put it at economic disadvantage compared to ECN's(which would be supported by USA). Allliance with Russia in economy as means to help its economy would further alienate it with rest of Europe(especially with Eastern Europeans). Finally the EuFed's incompetence could possibly seek to divert population from race riots and economic misery by military adventurism in Africa or Balkans and at odds with sovereign nations of Europe.
Hmm, maybe if you could stop worshipping your Reagan-Thatcher shine just enough to notice how in the light of recent events hyper-liberal economic systems demonstrably do not fare so good in the long term. The EF and the ECN fare pretty much the same economically, if any, in the long term, or the EF is going to get a significant but not radical edge from economic integration. Germany and France are far, far from being the economic underdog in comparison to Britain, nowadays. The idea that they, or the EU, are "incompetent" only exists in the minds of right-wing Europhobes. Moreover, the idea that the EF is going to be more lenient and more militaristic than the UK-led bloc is utterly ASB and ignorant of real politics. Go to check which nations enthusiastically joined GWB's lamebrained Iraq adventure and which opposed it, please, before spouting typical tabloid nonsense about a continental Europe frozen in 1940. Moreover, the USA are surely NOT going to pick a side between the EF and the ECN, in the long term, although they swing to favor either bloc a bit more under different Administration. Doing so would wreck NATO and the Western bloc, they equally need EF and ECN as allies.
A confrontation which would most likely be lost due to erosion of internal stability and trust between member countries and resulting into final dissolution of the Federation.
The Euroskeptic ASB dream-fantasy keeps unrolling. Be sure to wake up before the point where India petitions to rejoin the reborn British Empire.