Better think about if the loco list needs any changes too. I know Lirio has her ideas on rebalancing 1.06 locos, but her list of updates includes a lot of custom locos which aren't in a 1.06 base installation. So, I'm not sure how well it all balances out if those non-1.06 locos are removed, and quite honestly I don't have the energy and enthusiasm to look at working on all of them anyway.
So, what I reckon we need to do is look as the existing, basic, installed-straight-from-the-.exe, 1.06 loco list and see if there is anything obviously wrong with that. If that has any glaring inconsistencies or gaps we can think about fixing those for a start.
The basic list of 1.06 steamers goes like this (just giving names and availability):
Planet 2-2-0 1829-1840 NA E W
Adler 2-2-2 1835-1857 - E -
Norris 4-2-0 1837-1873 NA - W
Firefly 2-2-2 1840-1870 - E -
Baldwin 0-6-0 1845-1868 NA - W
Beuth 2-2-2 1845-1870 - E -
Crampton 4-2-0 1852-1889 - E W
American 4-4-0 1855-1895 NA - -
DX Goods 0-6-0 1855-1920 - E -
Fairlie 0-6-6-0 1862-1906 NA E W
Consolidation 1865-1912 NA - W
Stirling 4-2-2 1870-1905 - E W
Duke 4-4-0 1874-1902 NA E -
Shay (2-Truck) 1882-1930 NA - W
Vit. Emanuele 1884-1914 - E -
Mogul 2-6-0 1886-1920 NA - -
Ten Wheeler 1892-1921 NA - W
S3 4-4-0 1892-1925 - E -
Eight Wheeler 1893-1927 NA - -
Camelback 1896-1926 NA - -
Class P8 1900-1965 - E -
Class 500 4-6-0 1905-1945 - E -
G4 0-6-0 1907-1950 - E W
Atlantic 4-4-2 1910-1948 NA E W
Class G10 1910-1950 - E -
Class S 1911-1960 - E W
Pacific 4-6-2 1914-1950 NA - W
H10 2-8-2 1918-1950 NA - -
BR 39 2-8-2 1922-1965 - E -
Class A1 1922-1966 - E W
2-6-4T 1923-1960 - E -
P-2 1923-1960 NA E -
Northern 4-8-4 1926-1966 NA - -
Stanier Black 5 1934-1968 - E -
Class 01 4-6-2 1934-1982 - E W
Mallard 4-6-2 1935-1968 - E -
V2 Class 1936-1966 - E W
Challenger 1936-1983 NA - -
GS-3 4-8-4 SP 1937-1958 NA - -
Orca NX462 1941- - - -
Big Boy 4-8-8-4 1941-1971 NA - -
Kriegslok 1942-1967 - E -
U1 1944-1960 NA E -
242 A1 1946-1960 - E -
Class QJ 1956-2000 - - W
Red Devil 4-8-4 1981- NA E W
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Out of that lot the problems I can see offhand are:
1/ The Connie comes in before the Mogul, which aint right.
2/ The Ten Wheeler comes in before the Eight Wheeler, which doesn't seem right either.
3/ The Camelback is well known to be so useless that nobody ever touches it, making it a waste of a good engine slot.
4/ The World category is seriously short of grunters for most of the 20th century.
5/ World category also looks like maybe it could do with an extra express here and there.
6/ Duke shouldn't have NA availability since it just doesn't fit.