Not really no. Just grab a set of numbers, run with them, and BS the rest of it. After all it's not a manual for a 65 Mustang, it's a work of fiction for a fictional starship whose abilities are constrained only by the needs of the plot.
And of course, the producers of TOS only provided one or two numbers and the Technical Manual could have easily have been done without them - it's not like Joseph got most of the stuff he recreated right in any detail. The lack of numbers, for instance, didn't prevent him from producing drawings of the bridge - he misscaled it quite a bit, but the book flew off the shelves.
This is a specious criticism that directly translates into "I didn't like the movie."
Honestly, it wasn't till I played around in tech fandom (a offshot of RPGing) that I even knew about these issues. I honestly never noticed, I was just having fun having some diagrams to look at ~shrug~