I'm not sure if you have used larger front rotors on other bikes? I do, I run a larger front rotor on all my mountain bikes, and I like it, it feels completely normal, but I think the extra front braking power is an advantage and it seems to keep me from locking the rear brake as often.
Btw, nice build, I'm not familiar with Walty, but it sounds like you got a deal on it.
I run 160's on my MTB, but my goal for all other bikes in the Haus is to keep 140mm on front and back so I can easily swap all the whelsets between the bikes that aren't mtb.
Yes, I know it takes literally 30 seconds to swap out a center lock rotor, but this is my wife's bike and I'd rather not have her bug me to swap the front rotor between wheel sets each time she wants a dedicated road wheel set on there.
I did end up buying a 160mm for this and Enve was fan-tastic!
They gave me a code that was supposed to be 30% off but ended up being 100% off so I picked up another All-Road fork that will be used 100% with my Enve CX Tubulars on my new race bike being built soon by Paul at Rock Lobster.
Bought it before they knew they made a mistake, and it'll be paint matched the same Flat Barney Purple color my Steel SSCX bike will be.
Color example:
Build will be done in August, just in time for Cross'
-Rock Lobster Steel Frame
-Paragon Machineworks Sliding Rear Dropout
-56.5cm top tube
-Enve AR In Route Disc Fork
-Enve In Route 1 Piece cockpit
-Enve 27.2mm Seatpost
-SRAM Red AXS D1 Levers
-SRAM Red AXS D1 172.5mm Crankset, 42T, Quarq Powermeter
-Enve CX Tubulars with Baby Limus
-Chris King Aeroset Headset for internal hose routing
-XTR 9100 Pedals
-S-Works Power Arc 143mm Saddle