As a person who has been playing mmorpgs for over 6 years i have seen alot of expansions on these games.
Usually expansions for games means lots of new zones and content,and occasionally lvl cap increase and new kinda chars.
For these expansions you pay a one time price and no extra monthly costs.
This is exactly like Cov should be,the free issues they have been giving us is mostly changes to powers to make it more like "their vision" and fixes for existing bugs, in other games they call this just patches.
I dont mind paying the 1 time fee for the expansion game of Cov but asking another montly fee on top of coh is to much .
I see no reason why this company would want to suddenly cost alot more per month than any other mmorpg out there,not to mention that that would be kinda bad for bussiness i think.
Oh and by the way most mmorpgs have major expansions out at least once a year if not more,Cov will be the first major expansion Coh has gotten since release,since the issues have barely had enough "new content"to keep players busy since release(how many lvl 50s does a year old player have on average these days?)
just my opinion ofcourse