DigMod tried a reduced version that was almost totally convincing (he might have cut a little too much but overall it was better than the theatrical cut without creating continuity issues).
In my opinion DigMod’s version of rathtars is the best we can get (without causing any continuity issues). Chewie just needs to take one for the team and that’s about it. 😄
About the scene itself: the rathtars devour all of Kanjiklub in a matter of seconds but for some reason one of them starts dragging Finn somewhere? Why, oh why? Also… what a way to waste the talent of the Raid cast.