In general, yes, the linker (if there is one) would have less to do.

Position independent code (PIC) on the 6809 is pretty easy [1], but it does increase the code side a bit, but the resulting code can be placed anywhere in memory with no changes and still work. As mentioned, Motorola intended to sell a ROM with IEEE-754 floating point routines for the 6809 (as the MC6839) that was PIC. As far as I could tell, they never did sell the ROM, but they did provide it (with source) for anyone to use.

[1] Relative branches instead of absolute jumps, using the index registers to address memory, as well as addressing relative to the program counter. You can still do jump tables, but instead of a list of addresses, they're just a list of relative jump instructions. That type of thing.