Potion and charge buffs timers should be changed to 20 minutes. Charge DDs and Charge buffs should not be on the same cooldown. The Hibernia Realm task is not welcome for small mans or solo especially if you are visible. You can definitely find action in other frontiers, also it would be nice if there were better personal tasks for small mans and solos.
The devs have done a decent job at making multiple playstyles viable here, but more could be down to help small manning. Most players do not have set 8 man groups, so it matters to keep solo players busy in RvR.
I agree on the charges. It takes effort to get them only to be pigeonholed into a significant time and coinhassle. 20 minutes and no interference with self and other targets is a good idea.
I would also like to suggest re-implementing the recharging ability for alchemists or some sort of custom recharge stone concept.
I run small man and yes it hurts if you can't use dd charge since you used it for buffing, but everything comes with a downside. You can grp a buffer and be just fine. With the hybdrid buffs and lots of them run small man, its already interupt heavy.
Cost of charge barrels seems fine. You actually make the gold back (and more )by the time its used. However, cost of recharging items might be a tad too high. Liquid arcanium renewal does not seem to be available and npc recharger asks 100 g/recharge.