I don't think T20 is 'broken', there are just aspects of it I'm not happy with. And the new version was something I've been considering for awhile. The change in the Traveller licenses just prompted me to start moving a little earlier.
Yup.
From a licensing standpoint, there is a reason for an update.
From a Traveller standpoint, the only thing broken in the T20 rules is Large ship combat.
I will happily use these rules for any future Traveller campaign I run. I have CT, MT and TNE (If I can find the TNE rulebook).
I thought CT was too disorganized, with too many obscure and inconsistent modifiers.
MT changed combat so much that any body armor at all made characters virtually immune to small arms, required a computer, before personal computers were available, just to design a Scout Ship and had so much bad proof reading that Broken Ships of the Shattered Imperium is the common name for the Naval ship book.
TNE, I never thought the rules were worth more than a couple of glances and disliked the setting.
T20, gives us the feel of CT while organizing the rules and making them more internally consistent. Vehicles and Starships can now be easily and consistently designed and can take part in combat at the RPG man on the ground level.
So I'll keep these rules.