It has been suggested and declined before.
Main reason being a change of skill mechanics.
Some of the main points that were discussed in the past (these are what I can remember from my memory):
Arrow Crafting is limited to 50% weight because the ingredients are a lot lighter than quivers; raising the weight limit would devalue the quivers as you would prefer to carry lighter stuffs as you have already mentioned.
You can always get a party member to carry your supplies for you (especially those with a Push Cart).
Generally 2 quivers of each commonly required element is more than enough for a single ET/GMC run.
You can always sacrifice a few stats in Agi or Luk to gain some Str. I personally did that and it works for me. 1 Str (costs 2 status points) = 1 quiver.