During the funding period of the Librem 15 laptop I wrote an e-mail with questions and suggestions about the hardware design.
It took some days (a week?) to get an initial reply by Todd Weaver but after that responses came quite fast. I think in the 2nd mail I asked him if I could publish the conversation publicly and he agreed.
In the end I didn't buy the device because I didn't like some of the hardware details, but I don't regret having written that e-mail.

I think I know what you mean. I have a feeling they put too much emphasis on PR, at least in comparison to their actual technical skills.
I believe so far their success is in part based on pure luck and while I wish them to continue having that kind of luck, I wouldn't want to bet my money on it, because I don't feel it's entirely deserved by their own work.
So I'd like to encourage you to write that e-mail to alleviate (or confirm) your scepticism.