Personally I think some (or a lot) of the problem is that its easy to say "lets buy a package that does the job" but its quite rare these days to find something that will do the job that doesn't have too many strings attached.Yes. This.
Something like the unreal or hero MMO engine are quite likely to have some sort of royalty cost associated with them that will eat away at whatever profit they get and since CCP intends to use this technology in WoD as well your doubling the money that your essentially giving away to another company.
While to us (the customer) we want good results in a short time frame the long term objective of any company is to make money and its a gamble that CCP is willing to make that a short term loss (in terms of time and development cost) will turn into a long term gain (in terms of saved revenue from not having to pay out royalties) - especially if this engine will be deployed in multiple games.
Now would we be complaining if they'd been working on this behind the scenes for years and got it all polished, working and efficient? Personally I can see its potential but its far from ready and its CCPs fault for taking the roast out of the oven while its still cooking; but even then most players would agree that they are wasting time building content that people just aren't interested in to try and gain new players while losing the ones they've already got.
Sounds like the inmates are running the asylum at the moment; its take a while but I think CCP are beginning to see the errors of their ways.
As I said last week, the really remarkable thing CCP did here was to announce their intent to build what was essentially a second MMO inside their already-working first MMO. A lot of people have dismissively termed this as using EVE players as Alpha testers for World of Darkness, and that opinion is valid.
But it all comes back to that "total sci-fi simulator" that CCP wants. I'm still convinced that CCP hasn't given up that dream.