Well the part about the design systems it truly a joke considering they are based on High Guard and the original CT vehicles...
I recently picked up the T20: Book 2 at DriveThruRPG and I have to completely agree. I saw about 90% of it fully compatible with CT B2 or B5 and 10% subtle improvements (like the computer/sensors rules that were a nice blend of improved detail without excessive complexity).
It makes you wonder if the reviewer really wanted to buy the FFE reprint of CT Books 1-8? They would have been 'complete' and 100% CT compatible.