I see where you're coming from Heychadwick. I don't want to bore the forum by re-posting my argument. It can be found here where Vorpal and I do some number crunching...
https://community.fantasyflightgames.com/topic/183754-inquisitors-tie-vs-tie-advanced/page-18
I hope your version of the TAP turns out to be more true than mine. I'm thinking the TAP is going to be the equivalent of the Z95 to the X-wing. Because of the boost action, it already looks like they will be doing more than just reducing the primary attack by one, changing the speed of the greens, and reducing a point of hull. Just how much more though? Other than the addition to the boost... we just don't know.
A new twist to my argument, as to why I believe it will cost more than 16 points at its base, is the value of the top Z95 (19). Again, we see that 7 point spread I've been talking about between top and bottom pilot skills. If we subtract 7 from 25 we get 18. There is an 8 point spread between Vader and the Tempest. Let's argue that The Inquisitor's skill is just as valuable as Vader's (mind you we still don't match up on PS differences as Vader is a 9 and a Tempest is a 2, while The Inquisitor is an 8 and the base is a 2.) that places the base TAP at 17 points.
There are lots of ships with a PS+1 gap between the most expensive pilot and the least expensive pilot. There are also lots where the gap is bigger, and a couple where it's smaller. It's really hard to draw conclusions based on that day, though--the correlation between PS and cost is about 0.4, meaning increases (or decreases) in PS only explain about 16% of the variation in ship costs.