Some observations from a US game to the late 1840s, using 1.03b/VIP 0.3/Unofficial DR Patch.
1. This is the most fun I've ever had in Victoria.
2. The US Liberty Party is fantastic!
I industrialized a bit and made some event choices that (unbeknownst to me) turned a considerable fraction of my liberals into anarcho-liberals. I was surprised and a bit worried to see an American population that was 6.6% Anarcho-Liberal ... then I clicked on the party screen, saw the brand new Liberty Party's issues, and realized that I'd been handed an enormous windfall. Protectionism? Full citizenship? They're the Lincoln Republicans sixteen years ahead of schedule! I immediately called an early election. Faced with a choice between the conservative Whigs, the conservative Democrats, the reactionary Know-Nothings, and the anarcho-liberal Liberty Party, the liberal majority in the United States backed the extremists in droves. The money and the Europeans just came rolling in!
3. Unfortunately, this tremendous success was wiped out by Mexico's offer to sell Alta California. The price of the sale should probably be included in this event, because I bought it and ended up getting hit with a five hundred thousand pound debt. The interest charges were more than double the maximum possible revenue of the United States at the time. Instant bankruptcy.
I didn't have a recent save.
Please, for the sake of the American public, put Alta California's cost in the event text! And it seems a little silly to me to offer the event in the first place, since I cannot possibly see a way for the US player to accumulate that much money before the event fires. The US is an industrial powerhouse - but not THAT much of an industrial powerhouse.
4. Canada was wracked by revolts throughout the game, and the British did a very poor job of controlling them. Sault Ste. Marie, Ottawa, London and Ontario were all held by Rebel Scum for long periods of time. Victoria revolted and formed Columbia as an independent nation, which was then conquered and annexed by the British East India Company.
This seems a little broken.
