All I know is, Forza is really lacking in depth.
It really needs variety. Whether it's in the form of weather, night, new racing disciplines,tracks..etc.
The cone challenges, bowling and other attempts at adding in variety just doesn't cut it in the slightest. The monotony has truly set in...
If it wasn't for Spa and Bathurst, I would've been bored much earlier on...
I'm not surprised to hear this. I'm still playing Shift 2 several years after it came out because the wide variety of tracks gives the game incredible legs. There's a fraction of the FM5 car count but it doesn't matter one bit when you can race all day and never play the same track twice.
Lest we forget, and something for Turn 10 to aim for next time:
Alpental
Ambush Canyon
Autopolis
-Autopolis GP
-Autopolis Lakeside
Barcelona
-Circuit de Catalunya Club
-Circuit de Catalunya National
-Circuit de Catalunya GP
Bathurst
Brands Hatch
-Brands Hatch GP
-Brands Hatch Indy
BRNO
Circuit de Spa-Francorchamps
Dakota Raceway
-Dakota Club
-Dakota National
-Dakota GP
-Dakota Tri-Oval
Dijon-Prenois
-Circuit Dijon-Prenois Short
-Circuit Dijon-Prenois
Dijon-Prenois (1972, Legends Pack)
Donington
-Donington GP
-Donington National
Ebisu
-Ebisu Circuit Touge Course Challenge
-Ebisu Circuit West Course
-Ebisu Circuit South Course
Enna Pergusa
Glendale Raceway
-Glendale Club
-Glendale East
-Glendale West
Hazyview
-Hazyview Eight
-Hazyview Oval
Hockenheim Ring
-Hockenheimring Short
-Hockenheimring National
-Hockenheimring GP
-Hockenheim Ring (1982, Legends Pack)*
London Raceway
-London Club Drive
-London Millenium Drift (Drift only)
-London River
-London Royal Mile
-London Embankment Loop
-London Whitehall Drive
Mazda Raceway Laguna Seca
Miami
-Miami Park Drift (Drift only)
-Miami Bicentennial Park Route
-Miami Biscayne Boulevard
-Miami Bayside Run
Miyatomi
Monza
-Monza Junior
-Monza GP
Monza (1958, Legends Pack)
Nevada (Drift only)
-Nevada Freight Depot Circle (Drift only)
-Nevada Freight Depot Eight (Drift only)
-Nevada Freight Depot Slalom (Drift only)
-Nevada Freight Depot Open (Drift only)
Nordschleife
-Nordschleife
-Nordschleife (Aremberg)
-Nordschleife (Karussell)
-Nordschleife (Nurburg)
Nürburgring (Nordschleife)
-Nürburgring Mullenbach
-Nürburgring Sprint Short
-Nürburgring Sprint
-Nürburgring GP
Oschersleben
-Motorsport Arena Oschersleben B Course
-Motorsport Arena Oschersleben GP
Riviera
-Riviera Monument Loop
-Riviera Port Boucle
-Riviera Casino Riviera
-Riviera Monte Grande
Road America
Rouen-Les-Essarts
-Rouen-Les-Essarts GP (1966, Legends Pack)*
-Rouen-Les-Essarts Short (1952, Legends Pack)*
Rustle Creek
Shanghai
-Shanghai Yan'an Road Circuit
-Shanghai Nanjing Road Dash
-Shanghai Bund GP
Silverstone
-Silverstone National
-Silverstone International (2009)
-Silverstone Bridge Grand Prix
-Silverstone GP
Suzuka
-Suzuka Circuit East Course
-Suzuka Circuit West Course
-Suzuka Circuit GP
Tokyo
-Tokyo Docks Drift (Drift only)
-Tokyo Club
-Tokyo Dockside
-Tokyo Circuit
-Tokyo Westbound Expressway
Toyota Speedway
-Toyota Speedway at Irwindale Oval
-Toyota Speedway at Irwindale Drift Course 1 (Drift only)
-Toyota Speedway at Irwindale Drift Course 2 (Drift only)
Willow Springs
-Willow Springs GP
-Willow Springs Horse Thief Mile
Zolder
-Circuit Zolder