In the latest Lord of the Rings Online dev diary Bob “Maurath” Hess, newest member of the content team, goes over the 'solofication' pass of the Volume 2 epic. Hess says:

"When we first began to look at a 'solofication' pass of the Volume 2 epic, our team knew that it would be quite the undertaking. We ended up breaking the task into two parts, with Jonathan “Berephon” Rudder changing the battle instances in Chapter 5 into Skirmishes, and with me working on the rest of the Volume 2."

Hess breaks down all the changes that had to be made including designing goals, re-leveling Volume 2 Epic quests, and redesigning several instances. Read the full dev diary on the official LOTRO site for a full break down of the 'solofication' process.