Well first off you got the amount of months incorrect. You get 3 months of CoH and 1 month of Aion not 2 of each plus L2.

Do I think companies should offer a severance packages? I guess it depends on what they are trying to do. Personally I don't see how or why they can't keep a server or 2 going with 30,000 subs for Tabula Rasa. Its not a ton of business but it is a fairly large group of people. I played a trial that ended last week and the servers where not "empty" by a long shot, in fact I never had an issue getting groups up to level 17 (when my trial ended) and areas always rated "medium" at prime time. People were playing the game.
I can see in cases like Auto Assault and Asheron's Call 2 where the subscriber numbers dipped under 10,000 but in this case you have a viable amount of customers AND the end game content that everyone was wanting about to be delivered.
I would think the better route would have been to see how successful D15 would have went before making this call.
Anyway, yanking a game for no real reason if it could have been scaled down a bit more isn't exactly going to endear NCSoft to the customers.
Some free time in other games is nice BUT those paying players obviously didn't want to play those games.
Anyway, its not the first time this has happened and its more then likely not going to be the last.