50% bonus damage to the rocket of a nebel is worth piss all, that's why you haven't seen any difference, EliteGren. 50% more of 30 is still only 45 against most targets, and the DOT doesn't get any extra damage as far as I can tell. Might be a bit better against riflemen, if it actually hits (which it won't
)
Compare this with Stuka rocket which can now do up to 180 damage (from 120) and you get a noticeable difference on anything it hits.