I've played CT back in the early 80's (or late 70's, I'm not sure when I began) and had just began to buy some CT material by myself when MT appeared.
When MT was released (or at least when I learned about it), my first comment was on the line DonM tells: ' this one Loren K Wiseman must be a chaos agent: first he destroyed the Earth, now the Imperium' (my knowledge about him by then was as one of the T2K editors).
Nonetheless, after reading some of it, I liked it, seeing as a developement of CT by unifying and standarizing most of unofficial or late release material, and the biggest true changes were personal combat and ship design (the former I used quite changed, and the latter I liked most than CTs'), but I recognized Traveller on it, and I liked it (I bought nearly, if not all, what arrived to Barcelona about MT, and some things that didn't, while buying also what I could find about CT, as both were usable together quite well).
This was good for those already in Traveller, but I understand Zparkz problems on MT, as it was quite dificult to understand MT if you didn't know about CT, and most of MT's inconsistences and errata (of wich there were too many) could be easily overcome with CT knowledge, but may bog your game down if you didn't.
With the release of TNE, things changed, though. The general impression in Barcelona (at least among those I knew, and by then I was in touch with several gaming clubs) was that it has not been an evolution, but killing (some said murdering) Traveller and offering a whole new game instead. Neither in the setting nor in the rules we recognized Traveller. I guess some people probably played TNE here, but I know none. As most of my relations, we kept playing MT or outright left Traveller. Although there were no torches nor pitchforks I know about, just mass desertion. I also must admit real life took precedence and I was no longer so in touch with the gaming community...
As an aftermath, when T4 was released, I didn't see either a mass return of old players nor many newcomers, as game system was too different to be recognized as 'true Traveller' by most people I know (about me, I was quite disapointed about it), and the release of MGT seems to have awakened some Traveller playing, for what I know.