Former Eidos and Crystal Dynamics employee here with quite a few friends still with the company. Slightly pedantic but Eidos doesn't really exist anymore, it's all CD and Square Enix with a few more dev studios here and there.
Read the overly fanboy (girl) article in gameinformer with some of my old friends/coworkers over dinner and got some of their thoughts. Mostly they want it to succeed more from a "our company wants money" pov than anything else. Some of the marketing dudes can just make you want to puke with their catchphrase-esque laden conversation that's for sure. Mostly they were amazed at how lifelike she looks in that shot up page. In game stuff looks good too, almost like a painting IMO.
Toby Gard (basically the guy that came up with Lara) is still around as a consultant. When I worked there I thought he was nice enough but somehow he had finagled a Macintosh laptop and always needed tons of extra workarounds and shit to get him on par with everyone else. Thank god we finally got some copies of parallels so the few odd ball mac users could get Microsoft Exchange mails and shit without having to use the web interface and shit.
I remember when the guys that came up with that recent "Temple of Light" game popped that out of nowhere. It was more or less a company challenge thing for devs to come up with new games using existing dev tools and code and they busted that thing out impressing everyone. Probably the best game they've put out with Lara in a long, long time and it was also the cheapest and easiest! Around that time they started talking revamp too. Think the Star Trek relaunch had just hit as well... not the most original thinkers around.
I remember a few of them at that time asked me who does good "revamps" of existing characters. At the time Grant Morrison was getting pretty famous for all his comic book revamps so I suggested him and I think Joss Whedon had just done an X-Men revamp. Grant Morrison turned them down, IIRC, and Joss Whedon was interested but I don't think they found him to be as affordable as they would have liked, again, IIRC. Crazy that they actually contacted these dudes just from an offhand recommendation after a week of binge comic reading...
The game is rather anti-established TR gameplay. They will actually spend some time on combat mechanics this time. (Unlike TR:Legend where I remember them literally just tossing in the lock-on-and-shoot mechanics all in one build and never looking at it again.) They joke about the "survival" aspect of the game with things like having to forage for food and water, which I hope isn't exactly how it sounds (ie: shitty.) There is a big focus on trying to make puzzles and solutions seem more organic and less on-rails than previous games and on psychological aspects of what is going down and how it shapes this young Lara. For example, some dude jumps you early in and you have to shake him off by wiggling the analog stick. All the while he is telling you to calm down and that he'll help you, but if you don't shake him off he just friggin stabs you dead, lol.
Gameplay still a little too focused on "quick time events" like "mash B not to die!" for my likes but we've only seen like 2 minutes of actual gameplay from the beginning so who knows how much there really is.
Lara is supposed to be significantly younger in this game so I suppose there is still time for her to grow bigger boobs or whatever. Dunno how I feel about that. On one hand I think they should have stuck to their guns but then again it's a revamp/reboot/whatever so they need to take advantage of that opportunity. She kind of looks different in the face too but they made sure to keep the ponytail.
My friends need jobs, buy this game!