Unfortunately i have to agree with you.
Unless the API are released to the public, very likely we won't see new functions, or a better speed, any time soon.
I don't think it is IMPOSSIBLE, though.
One little example: you can turn off the camera from Image Transmitter, but you can't turn it back on. You have to do it from the camera.
On a much relevant level: why don't allow Image Transmitter to work in Wi-Fi mode? If it can be done with an iPhone or Android app, smaller in size and with a much smaller memory footprint, i can't see why the same functions should not be made available to Win/Mac users too.
I have no intention to get into the issue here and now, i just mention it,
With the release of the K-1, Pentax already did a lot to meet the needs of its loyal customer base.
Ricoh/Pentax could have gone one step further, with a decent mechanical diaphragm simulator (no need for green button with K/M lenses), and releasing a commented source of the firmware of the oldest models.
Some don't even have a Sony sensor, i don't think Pentax would disclose anything really important, at this stage.
In fact, all the major player are copying each other and very, very likely are also reverse engineering the software of the competitors.
Independent developers don't have the resources to do that, but if the firmware of the first generations of digital cameras was made public domain, a lot of interesting functions would be made possible.
For example, i own a K-1, a K-5 II and a K-01 that i actively use, but i also gave my K200D to my wife, and i have a K10D with microprism/split-image screen, that is perfectly usable with old super-fast primes.
I also have a *ist D that still works well with my old TTL flashes, The same ones i've used for macro with my LX
I don't know if we can really ask a japanese company to be so innovative, but i think that it could have been a way (IMHO with no adverse effects) to tell the same loyal customer base the K-1 caters to: we don't forget about you.
cheers
Paolo