We are USAA people and I have used their retirement calculator a number of times. I have also called and talked to a financial advisor who essentially walked us through their advanced retirement calculator online over the phone. In the previous incarnation you could only select from three options of how much your spending in retirement would be: same as now, more, or less than, which was around 80% of current income. Obviously that sort of option doesn't work at all for someone saving 50% of income.
We danced around this a bit and finally finagled a funky workaround by artificially lowering our income so that the spending option would align with my best estimates. I gave the feedback that they needed to fix this tool, and low and behold, a couple of months later there is now a "custom" option where you can input exactly what your retirement spending is expected to be.
Motto of the story is: if there is a way to provide feedback then you should do it. You never know when someone on the other end may actually listen.