I agree on this. Zenies only use seems to be for broadcaster or buying Bottles for Acid Demo. Something I would like to see playing and Alchemist and all would be a scroll that crushes all of the bottles into a scroll. So you can buy the scroll that will once used give you 500 Acid Bottle and 500 Bottle Grenades. Knowing that this class relies on these bottles for pvp capability and that they fly through them really really fast this would be useful and not to over powered. Would give more worth to zeny to. Or could create an npc to make the scrolls and players could sell them for zeny or what not.
Another Idea for making zeny more important is for when we get new quest coming in make zeny more of a requirement like there is on the Dragon Aura Quest.
I like the idea of buying scrolls for buffs, but this at the moment would only be beneficial to richer players, they have more use for it, can afford them, and would be more of an unbalance in LMS.
Something that is very valuable to players is Voting Coupons. The rewards you get are really good but it can get annoying waiting 60 days to get a scarf 60 days since the vote site is weird its basically 1 vote a day now. Would be 500m For one vote qpon keeps its worth just something for desperate players to rush. Also people could use this to buy zeny waaaay more often to try and get vote coupons in a rush when they need them and the price is high enough that people will still vote instead of just buying vote qpons also. This is kind of a touchy suggestion but, I'd like to see what peoples input on it are.