Interested in 1.5 from a US perspective only.

[tomoose]

I'd like to get the add-on but am not interested at all in the U-boat aspect just the Pacific (I'm quite happy with U-boats in the Atlantic, as with SH3).
Having said that, what advantages is 1.5 bringing with it in regards to the US side? If there's nothing extra with the US stuff should I just stay with 1.4?
I know the add-on is not a lot of bucks but my setup/mods/tweaks etc for my US campaigns are working great and I'd rather not 'undo' all that if 1.5 is not going to improve anything so to speak.

Any and all advice is welcome.

thanks,