so i finally got the tatsu and started using it cuz of its sweet skin from the radio and overall it's pretty solid. however, when doing a ground finisher it seems to align your warframe like 45 degrees off to its left and so usually misses said enemy (on account of the small hitbox). testing with a few other weapon types didn't show the same thing happening so i assume it's tatsu/2h nikana/wise razor specific.
so, uh, is this a known bug? if not, send help! if so...woops.
ps: seismic slam (200% inc slam damage mod) doesn't seem to work at all or at least it didn't seem to work on the tatsu or gram prime.