To the best of my knowledge (I have NOT read the Owners Manual cover-to-cover) there is not a way to customize how the system pre-conditions the vehicle upon remote start. From what I understand, it basically reads the outside temperature, and if it is above or below the preset thresholds, the predetermined settings are engaged. It will cool or heat the interior based on those presets... and I do not know of how they can be altered.
Similarly, I do not understand why they could not (have not) enabled deeper functionality of the Uconnect Remote App for your mobile phone. It seems EXTREMELY limited to only offer lock/unlock and remote start/stop from the app when you SHOULD be able to see/control other functions once it receives the confirmation it is running.
It would be nice to set the climate controls to what YOU want via the app... turn on/off seat heaters, vented seats, heated steering wheel, open/close sunroof or sunshade for panoramic glass... set rear defroster on, etc. - or even better: SAVABLE PRESETS for the user.
If Uconnect offered THAT level of control, I would GLADLY continue my subscription after the free one-year trial... but to basically JUST get to remote-start my car when I cannot see it...? NAH... not worth the $$$ at all.