Doubtless, given the fact that my earlier posts did not attract responses, I should take a hint and not supply further data. And yet, here I am, making another post
I ran two tests, playing Hawaii and Wallachia respectively. In each, I used Neville to steal enough claims from USA and UK to keep them from claiming colonies in North America. I also used Neville to rob Mexico of Utah, AZ, NM, and NV, and USA of the Dakotas.
(Wallachia is superior for this kind of testing, IMHO, as it never faces the threat of being annexed via events. You also get more diplomats once you break your satellite status and can claim colonies in North America. It also seems that neither US or UK will declare war on you, possibly due to guarantee from Russia)
In the Wallachia test, I claimed the colonies myself, then doled them out slowly to US and UK to reflect something like the pace at which the west was won. In the Hawaii test, I just kept anyone from claiming anything, except UK claimed Alberta, as I forgot to steal both of its forts. Both saves are from 1872.
The raw results, scores, then factories/divisions:
Hawaii -
GER 2627/129/807 173/82
UK 927/242/331 93/151
FRA 1529/40/201 60/34
RUS 147/173/594 86/119
USA 232/78/ 453 56/47 (CSA not yet completely reabsorbed, CSA data not recorded)
Wallachia: (Prussia backed down in 1866, got white peace in Franco-Prussian war, USA has not yet reabsorbed CSA)
AUS 1353/45/393 56/39
UK 885/188/368 85/96
RUS 150/56/793 123/37
PRU 780/58/443 72/30
FRA 845/93/312 89/62
ITA 561/35/228
USA 316/47/333 85/33
CSA ././98 34/..
The USA's prestige is higher before the secession of CSA, which caused it to lose about 2/3 prestige. For prestige purposes, it matters a great deal what the status of the ACW is when you measure things. As the USA regains these territories, it regains prestige (which seems appropriate). USA also gains a lot of prestige from annexing Texas.
To a lesser extent, this is also true of industry. In the second example, we see that if the CSA were conquered, USA would increase factories by 1/3, moving up several rankings to 2 or 3 in Industry.
But keeping the USA from owning the NW, Mountain West, and Great Plains has virtually no impact on Industrial score. We can also see that the insane number of factories is a problem for all the AI.
It may add a lot of color and good gaming to include Indian nations and their graduation absorbtion, but I think it will do virtually nothing to retard USA economic growth, and it will probably only retard prestige growth by about 1/3.
I'll likely try a game where I just eliminate all the claims and convert much of interior Alta California and the Great Plains into empty territory and see what that does.