We don't know what the Empress Wave really was. Nor did it flatten the setting, it was to be a future event in the TNE timeline.
The Empress Wave had no affect on MT, (it was never introduced as an idea until they had been working on TNE for a while) it had little to no affect of TNE other than causing the Zhodani (partial) exodus.
We have third party retcons galore but we have never been told what it really was or what it would lead to post the war with Lucan's Imperium.
The Imperium fell from the moment Strephon was assassinated to the apocalyptic end heralded by Hard Times. Virus wasn't even needed, the Empire had been shattered.
Virus was introduced as a mechanism to ensure the Solomani didn't just sweep in and retake whole swathes of the Imperium, Vargr raiders and the Juulian Protectorate expand into Imperial space etc.
It was also introduced to wipe away all the warring factions, thus ensuring that all faction fans were equally unhappy, because Dave Nilsen (line manager at the time) felt that to have any of them survive or 'win' would be to in some way to validate all the killing and dying. So they all lost (Regency excepted, and it had avoided all the fighting).
I hope Mongoose just waves a magic wand and retcons the wave out of existence, rather that than the retcon Don introduced and Marc appears to have got on board with. or better yet, pick up the phone to Frank Chadwick and Dave Nilsen and find out what the original plan was if there was any.
There was one, at least vaguely.
Back you your trick question.
The long night was a historical event in the setting, the empress wave was a planned future event for TNE (it has nothing to do with the fall of the Third Imperium).
I think it was Frank who once stated he wished that Classic Traveller had been set during the Long Night...
I wouldn't have been happy if
TNE had been moved to the Long Night, leaving the
MT arc hanging. The long night is all very well, but it caps out at TL12, which is great for some game, but not for all. A collapse from TL15 makes for much more interesting (for greedy, power-mad PCs and players) loot and tech toys. What's more, the New Era setting lets you play a TL9-12 game if you want.
I liked most of
MT. The standard chargen was good, the task system was good, the combat system was good. That's most of what players will be interacting with right there.
What I didn't like was the extended chargen - that should've either been fully universalised or taken out the back and shot. It was extremely abusable and characters made with it were often stupidly better than those made with the normal system.
The design system was... not good. Needing TL15 to make way too many normal ships function, etc.
Then there was the travesty that was
FSotSI.
The choice of the
Merchant Prince system for cargo trading wasn't the right one - it took what flavour there was out of trading (and
TNE retained it, when in the New Era trading should've been made far more random and quirky).
I think
TNE is a better system, and that its authors had a better idea behind how to manage an advancing timeline than
MT showed, but to me
MT is the high point of the CT-family of
Traveller rules (
MgT, either edition, is not an improvement).