Professionals, please enlighten me. Would not a 24 - 90 2.8 or 28 - 90 2.8 be an "ideal" walk around lens. While I don't shoot full frame, I would imagine a lens of such focal length would be ideal for a general purpose lens given it's 2.8 (as opposed to f4) and is long enough to reach the "ideal" portrait focal length of 85/90mm.
28mm wouldn't be wide enough in my opinion, but 24-90 would be amazing, particularly if it were a legit 90mm. That would make it a much more viable portrait lens, too. I love my Tamron 24-70 VC, but it is really a 23-65mm. Great on the wide end, but the long end isn't really what you would call long.
I'm very interested in some of these lenses, too. Right now I only use legacy glass in the 50mm range (couple of Helios lenses as well as a SMC Takumar 55mm f/1.
, but I would interested in a great modern 50mm without the quirks. I love my 135L, but having OS/IS on a lens like that would really be helpful in my event work. I might even be interested in one of the teles if it weren't too outrageously priced. Looks exciting.