That said, the core MegaTraveller set did consolidate and tidy up lot of the Classic Traveller stuff that came before. Some of the rules were neat and the whole thing functionally worked under the same 2d6 basis as what went before. It’s entirely compatible, and arguably has a much more polished and clarified ruleset. On top of this, if you do like the Imperium setting (in this specific era) then it does give you a lot more setting material to run with.
Just to note, while I agree with a large part of what you say, this bit is only true at the level of a player character. Vehicles and spaceships are significantly different, and there are smaller changes to system generation as well.