FYI this isn't about 1h themselves but about allowing 1h more room to change their stats internally so you can better balance 1h. Because the Paramarion is super powerful, but if 1h had a higher cap, you could make the shorter, more expensive 1h have more damage so that these weapons are BALANCED INTERNALLY.
This isn't about increasing 1h damage on all weapons, but about increasing the max allowed damage a 1h can use. The current max is 37 and the item balance team won't go over that. If they did, you could re balance all 1h weapons so that no weapons have the same stats or are redundant. My example is the spathion. It's literally a Knightly Arming, but 0 slots, and they are going to remove the 0 slot to make it 1 slot. If they do do that, then they need to make it competitive with the knightly, not a more expensive variant.
If they had a higher cap, they could make the Spation 1 damage more so that for that extra 1k you get a just slightly stronger weapon. There's other weapons you can use, but has no one realized that 1h swords max their damage at 33-35(unless loomed)? It's cause Item Balancers won't let them go higher, so you get tons of useless 1h.