This is a pro level feature set. I don't think most flyers feel bilked that they can't do this. Absolute price sensitivity (meaning bottom line, not "cheapest business class") is the factor for most people and that is easy to see on any of the flight search engines.

For most perhaps, but I want to know what I'll really pay. I already know I'm going to check luggage (or not, but now that I have kids and am going for longer vacations checked bags is not something I'll do without), so I want to see the price with checked bags. Likewise I know I'm willing to pay for the legroom of economy plus (the rest of my family doesn't care, though my kids are soon hit their final growth and soon will). I've just added $1000 to my actually price, but all I see is the per person ticket price with no options...

There is a reason I took Amtrak last vacation. Too bad they doen't go do where my next vacation will be.