Make it simpler to switch the main character's class

Today it is very expensive to switch mains, so very few people do it, and thus most people miss the breadth of AO class system, sticking to their initial class choice. Simplifying the way to switch main classes would benefit players a lot, especially the end gamers, who tend to get bored and quit after their reach 160.

That said, there has to be certain limit to that class jumping, otherwise you could expect people switching classes every day - be it to compete in PVP or go raid. Some possible solutions might be e.g.:
1) allow only one class changer per month
2) allow changing classes only to characters above certain level (e.g. 145 as an example).