It is a penalty to us if we have to run 5kg extra actually... come on. The cars are "equal" at the moment, but some have definite speed advantages down the straight, my complaints about that were basically ignored, so I've chosen to go with the fact that since we can all run more-or-less the same lap time, it'll do.
20kg at Laguna is costing me about 0.3s per lap. 5kg is therefore just under 0.1s - not a lot, I will agree! But qualifying last round had 0.1s between 1st and 3rd. So yes, it's an issue.
If it's "not going to cause any difference to our laptimes", then let's take 5kg off instead