Eh, I kept looking for the source of the rumor about the increase in RC cost of account tokens, but have not found it...
Yes, working as intended. The parameters that govern account token pool are set directly by witnesses. That was enough reason to make sure other RC changes don't affect it. Besides account tokens are already outrageously expensive and they swing in price by 30% on daily basis (due to pool being almost dry all the time). Not much room to make them even more costly IMHO.
New account tokens - no change (by design).
Refer to this article for comprehensive description of all RC changes.