Does or will exFAT support symlinks?

No

Soft links:

• NTFS Yes
• exFAT No
• UDF Yes
• FAT32 No

Reference: File System Functionality Comparison

Symbolic links are nowhere referenced in the exFAT feature list. Additionally I remember that NTFS symbolic links only work if source and destination are NTFS partitions.

May be it is sufficient to mount the shared exFAT data partitions as a sub-directory somewehere on the NTFS partition?