Warning: Spoiler! (Click to show)
So, my problem with toebox creasing. I'll start with the good ones. Above are my Mctavishes in 12D. Creasing at a minimum, small crease in leftfoot toe box. But I'm happy here.
Chesters in 12D. No toe box issues. Great shoe! (I know-- who needs 2 pairs of black wingtips? Apparently I do.) And no trees in them right now because I just took them off briefly to take this picture.
MacNeils 12D. Creasing like crazy. Toebox on right foot collapsed at one point (Notice the light brown discoloration). Currently, the tips are stuffed with newspaper. Warning: Spoiler! (Click to show)
All of them have trees when I'm not wearing them. I try to polish them once every 2 weeks (The bayfields are definitely due for a polish today.)
Edit: let me add that the fit on all of them is good. No heel slippage, no cramping of the toes.
My calf MacNeils are starting to crease like yours - the big lumpy crease. I wonder if it's just the way the shoe is constructed and/or the double sole? It's very stiff and sort of "overbuilt" near the front.