My opinion on all of this:
Route 7: Twin the whole thing. We won't be able to use our 250-foot medians like we do on most divided highways in NB because of the Base, but a simple concrete divider should solve this. A new route from Geary to Welsford could be done if the economy magically gets better, but I'm not counting on it. Realign the Route 8 interchange, use roundabout on Route 8 since the speed limit will be shorter with the Smythe Roundabout anyway. Gives good access to College Hill Road, UNB/STU and the Hospital.
Route 8: Realigned PMB North interchange, controlled access at least to Doaktown, then to Miramichi, plus the Miramichi North Bypass.
Route 11: Twin to Richibucto, create a divided Super Two (like
this section of Interstate 93 in NH) to Miramichi, as well as Route 8 to Bathurst.
Route 15: Controlled access to Port Elgin, plus 16 to the Bridge. Interchange at Wheeler and Lewisville Rd in Moncton.
In Freddy, Third Bridge (It won't be needed for at least 10 years and Gallant will probably be gone by then), freeway across Northside to Marysville Bypass, freeway from New Bridge (which IMO should run from the end of Ring Rd. to Prospect St. and Springhill Rd) to Route 8.
TOLLS: Reinstate tolls on Route 2, but west of Route 1, where it would make less money but cause less uproar than it did when the highway was built. Add tolls on Route 2
here for maximum efficiency. Tolls would also be an option on twinned Route 11.
That billion in Infrastructure ain't gonna pay for itself.