In theory if he would have accepted the gutter throne it would have been as a ruse. Once such an Empire was in place, as Emperor he would have simply broken the parliamentarians and re-established this new Empire as an authoritarian one. Although here I am probably ascribing to FWIV Machiavellian instincts he probably could not grasp.
Friederich Wilhlem is a bit of a weird character so his true motivations are a bit hard to ascertain.
His aristocratic sentiments were offended by the idea of accepting a "crown from the gutter." That would put him in the same mold as Napoleon who in his own words, "picked up France's crown rom the gutter and cleaned it with the tip of his sword." He's also not wrong for rejecting the demands of the revolutionaries. With how easily their support and "government" collapsed, at the end of the day it was a fragile and shaky overly idealistic movement with very little substance behind it.
For someone like FW who would more likely be forced by in his view was a "Rabble mob" to accept such a disgraceful proposal, double crossing the liberal revolutionaries is an acceptable path for him to take.
At the same time though he was also open to the Habsburgs having some nominal leadership of Germany illustrating his romantic sentiments,
From what I read, Frederick William IV of Prussia was a hardcore romanticist, and would've preferred a Habsburg taking the Imperial Crown, and would only accepted the crown had the other German Princes elected him as such, and not the people.
Yup. Though after the 1848 Congress fell apart, a year later Prussia tried again with a congress of princes called the "Congress of Erfurt," trying to spearhead Prussian led German unification.
But grabbing an Imperial Crown from gutter, washing it off, rebaptizing it, and ennobling the constitution in the 1848-49 timeframe as @Comte de Geneve suggests would be an interesting and quite significant historical divergence, even if the new German Empire starts off as a pretty conservative monarchical state.
Nah that was what Napoleon did. This was exactly what the powers and aristocrats Concert of Europe were ideologically opposed to.
They did. The answer to "what can happen if we accept hard OOC behavior" is "whatever the writer wants to be, as behavior is functionally arbitrary now" and so all answers are now equally correct and wrong at the same time.
Agreed it would be OOC.
There would need to be a radically different pod leading up to 1848 revolutions. It would possibly need some sort of geopolitical shift going back to at least the end of the Congress of Vienna for it to work, creating the circumstances for Prussia to even feasibly entertain the idea of unifying Germany in such a fashion.
In my timeline Imperator Francorum (on hiatus for now), I was toying with some of these ideas. Napoleon died during Leipzig which takes the Hundred Days off the board and makes the powers of the Concert of Europe more complacent with Napoleon dying in battle instead of him launching another hundred days style uprising. This changes things in the early part of the century like with Russia who might feel less of a need to extend the idea of the "status quo" with the Ottomans.
Basically in my timeline I plan on Napoleon II surviving and eventually coming to power in the 1830's with Charles X's deposition and Britain potentially being taken up by political turmoil followed by a stronger Chartist movement.