Woah... the thread as been busy.
I structure a few points as to the topic - and also not to poke any fires (again)
Release Strategy
Actually I am no fan at all to any "pay more get more" schemes in games - I frankly hate it. Hence we spread it out by release windows, but not by content differences in the actual game or story. For me that is also simply a nightmare to write.
Anything as a type of a "bonus" should be (IMO) a real extra, like additional renders, WiP stuff, etc. - but the final product, should be exactly that, final... and not sliced and diced in pieces to nickel and dime the fanbase/supporters.
Development Time
Just to add as I hear "it takes too long" from time to time (and I hear this for other projects where I am just a casual supporter as well, so nobody take this directed at him or her please; and I confess I have sung the "why does it take so long" song myself at a time) - the more complex something gets, the more planning and detailed execution it requires. I've seen projects where I got the distinct feeling that the "x months" delay was just an excuse to siphon money from the supporters. So we try to be transparent and upfront about our timeline, keep the supporters involved with WiPs and updates - unfortunately it still takes time to conceptualize, create and package it all into something that ends up as a "release".
Content Questions
The path with Astrid is high on my list, but as Des already said it will be embedded into the story - so the path with Astrid (should you chose to pursue it) will continue.

And yes... there will probably be spanking involved.
The photo shoot with the "rich guy" is one way of getting the information that Lara needs -
there will be another.
As for the whole Support/No support thing I probably post that one extra (as it will have nothing to do with the game, but a few comments raised my curiosity about overall perception of funding methods).