Hey Davi, my Tricker's so far, all 4497 of different widths, have been quite comfortable out of the box.
Compared to Alden and Viberg, Tricker's is slightly harder on the sole of the feet for me (even after the cork layer has moulded), but other aspects of feet comfort compares similarly.
I did the same as you, one whole size down from US to UK, and the fit was good in length and I did not have the same trouble as you with regards to the vamp height.
But Tricker's considers their UK sizing only half a size down from US sizes, and Richard at the Shoe Healer warned me when I bought my first pair that the 4497 is strange in that the height of the last is somewhat lesser in proportion compared to the width of the last...wide & short, to sum it up.
I was told that a 4444 last would be a good option to try if the 4497 did not work for me.
Otherwise, I'm thinking you could either go a half-size up, but you could end up with a bit more room than you like in terms of toe width.
Or opt for a fitting '6' in the 4497, though the last height isn't much different to a fitting '5', so you most likely will still have the instep/vamp problem.