I like the old model, but is it worth it's points. Yes you get the nice impact charge, but for a crew of six models you only get 1d6 worth of combat miniatures.
That's bad when 3 of the miniatures have firing weapons. OK when the model was made we could not get Hochland Longrifle or Repeating Muskets, so that's 4 shots just there, both with armour piercing.
Not sure on the Blunderbuss, remember there being rules in a White Dwarf and it taking a turn to reload.
The other 3 weapons are combat. Ball and Chain, same rules as flail, +2 strength in the fire round of combat. Hooked Halberd, no rules, but at minimum same rules as halberd +1 strength. Man Catcher ? any one's guess.
So sorry in my humble opinion I would rather take a Master Engineer with either of the ranged weapons.