I am now wondering how to route OSC messages I get from oscparse. I
would love a behavior similar to routeOSC but would like to stay
within vanilla Pd.

The internal [route] object itself does not allow to parse
more than one layer of OSC address space when receiving messages from

So you use more than one ….

[oscparse]

[route part1]

[route part2]

oscparse and seems to have problem with numbers in the address.

There was a discussion earlier on the list about it not handling numbers in the address.