I do agree that old content should not be relevant forever, but people should still be able to DO it. In WoW you can still go back through old raid instances and blitz through them if you want. Not so for CT because you have to get 24 people queued up for it which is a real pain especially in the case of LoTA, and it will only get worse over time because fewer and fewer people will run it, which is a real shame because CT is a gorgeous and pretty fun raid with a decently interesting storyline that ties into the main story.
On the other hand I don't want them wasting development time on making old raids accessible. It should be a cut and dry fix like allow undersizing, remove all monetary rewards to prevent RMT from spamming it, and have undersize version apply like a 50% stats buff or something.