WTF is going on with Thunderbird ?

I've been kindly asked by email to share my views on Open letter to the Thunderbird community, and I will comment on the tb issue as a whole.
First of all I would like to thanks David and Scott for making tb, I wish them luck for whatever they are going to be working on in the near future. I started using tb in around 0.6 because at that time Apple's mail.app was not really happy when exchanging some file formats with other users (and in particular with something called Lotus Notes). I've used it ever since on my home machine and at work with the latest job I got. I remember why tb was created back in the early days of Firefox, basically because one big administration company contacted mozilla when mozilla decided to drop the suite and that company/administration wanted a replacement for email, hence was born Minautor. Ever since it's birth the project never got main stream attention while Ff was getting all the lights. In the last year getting TB releases as been something tedious, and at last fosdem a few of us where saddened by the situation. Things got worst when API where rewritten with only Ff in focus breaking tb, as I will try not to argue when it comes to camino for API breakage, I tend to disagree for tb as it's a supported product from MoFo. Now I was thrilled by the MailCo announce, meaning that tb would get the proper work force for some low level issues to get fix (UI is pretty stable and as been worked on for a long time, but some low level issues and code have not been touch in year). I'm now sad because the main devs, those who know how the product works are leaving, meaning that the team that is going to take over will have a hard time catching up on all those internal things - Which means that tb development will get a slowdown in the next few month - for that I am very sad.
So comming back to the letter, I whish we learn why the guys where leaving, I whish we had some goals other than making tb suck less expressed in public on the future of tb. And a nice milestone planning would have been a very good thing (and I would have expected a planning without dates).