Just from some quick browsing:
The deflection damage for AT sections BOYS rifles gives too many digits of precision.
The comet vet 3 reload bonus is not reflected in the stats (unless there was a mistake in implementation and the bonus was never actually added...).
The luchs 2cm cannon does not list its target table (an accuracy multiplier against vehicles).
Some OKW units (mostly the vehicles) only have stats for up to vet 3, even when they receive relevant combat buffs at vet levels 4 and 5. For these units, tables for vet 5 would be very useful to have, if possible.
The ostheer 222 doesn't have the 2cm autocannon listed under its weapons, only a (presumably 221) pintle mg34. Odd since the pintles are clearly mg42s to begin with...
Partisan tank hunters are missing their panzerschreck. They only list their KARs currently.
Shock troop ppshs (found on shocks and airborne guards) are listed, but lack an actual name in their entry.
Trying to select the KV8 seemingly redirects to the KV2.
Assault guards do not have thompsons listed under their weapons, only svts.
Trying to select cavalry riflemen or penal battallions causes the website to hard lock/freeze.
Regular pathfinders aren't pulling the correct sniper weapon, and I&R pathfinders are missing it entirely.
Vehicle crews are missing the (doctrinally possible) thompsons and only have grease guns listed.
The WC51 lists only its gun stats at vet 1. It gets combat bonuses at vet 3, so listing the gun stats at vet 3 would be useful.
There are also a lot of dummy/unused/cut weapons, though I'm sure most people are aware of that fact since it was true of the last unit stats site too.
Thanks for the input! Ill add it to my #TODO list
Could you list some units that benefit from Vet 5 that have missing weapons please. I think most of them are just "sprint", "healing", "+5 site"...