I have been playing around with the Traveller Adventure...not yet running full Mongoose Traveller. The biggest problem is combat - so I am hoping that they might release something like At Close Quarters [or I think that GDW did the same thing with Mayday (as I don't own that supplement)]. Essentially, Mongoose has to keep the simplicity of what they have devised, consolidate combat as single system (whether it be starships or vehicles or individuals) and make realistic armour+weapons damage accordingly. But this is a known bug.
Also, figuring out the tasks is made even easier.