Hmn, my motivation for delaying it is actually not born out of egoism, I do want to play the game absolutely (favourably yesterday) and I do know that PDX has a great track record of keeping the development of games up, constantly adding features and most of the time improving the gameplay. I do however not concur with "lots of people like the gamestate so release already". Lots of people liked the gamestate of Rome 2 before release and it turned out to be quite broken. Lots of people liked the the gamestate of the newest Stellaris expansion and it turned out to be quite broken.
I do realise that I did not clarify my opinion well enough, what I meant is: If The Imperator team would decide to delay the release date, I would be fine with that as it ultimately would mean that they don't think its in a good state.
Releasing a game with lots of bugs (not saying Imperator has those, taking a more wide approach here) does hurt your reputation as a publisher, which means less copies sold, less money available for further development of DLCs/Patches and new games. Taking the example of TW:Rome 2, it took until the release of Warhammer TW 1 for CA to get back the same standing with it's fans as before the release. And don't get me wrong, the game looked amazing, the AI looked capable in the pre-release videos, everything looked like polished and nice. (Tidbit, its not actually reasonably good and challenging when played with the DEI mod, AI is quite capable and only brakes in certain instances)
For Imperator, I expect to see a lot of smaller Bugs, and a few bigger Bugs including CTC's on release. This bit will be unavoidable, just because PDX can neither test all PC configs nor find ALL the bugs that exist (or have time to solve all the minor, not impactfull ones). I do however expect a game that is balanced (in approach not nations) and fun to play and when they (the DEVs) would have decided for a delay, then I would ahve been perfectly fine with it.