Agree Oginme. I have actually stopped replying to Brad's "you have been a good supporter for years, what would you like to see change?" emails as the requests you have put forth have been ongoing for years (and I have independently put these up as well as adding my vote to your requests).
The other place I thought the grain absorption might go would be in the mash profile? I find different absorptions depending on how I mash, though in all honesty, this is mainly with decoction. Would be easy enough to have an equipment profile for this.
I'd also like to see the ability to record pressure with the temp/gravity fermentation readings.
Your point about being able to record the actual observed values in the vols tab is really valuable. As it stands, I have to do some creative accounting, adjusting the equipment profile in the individual recipe to reflect the boil off, and using the mash tun addition or deadspace (sometimes with negative numbers) to account for variations in grain absorption while retaining the actual mash and sparge volumes that I used. I get the purpose of having the automated calculations to plan a brew, but the inability to record actual observed values is the major problem of the system.
I'd also like to be able to calculate a starter for dry yeasts. I know that there is a push for just sprinkling them direct to the wort at pitch, but I still use starters to save money on multiple packets (or to revitalise older packs, or reuse harvested yeast). Even if the cell count numbers aren't perfect, it's useful to have a record that I made a 2L starter for that brew. I currently have to pretend they are liquid to do this.
I like and use the water calculations, but there is no simple display of the final water composition estimation. When matching a target, it gives you the total adjusted water profile (with the suggested sparge and mash additions - but that is to make all the water the same, like mixing in a big pot then separating out). Then you can make your adjustments to the mash and sparge individually (which it shows individually), but you cannot see the final profile. Some may put all their additions into the mash, or hold the sparge additions until the boil (which is selectable). The values displayed on the water tab show the mash and sparge estimates, but not the total, which is the whole point.
I'd like some ability to enter new acids or salts. Sure, we probably need more info than just 'acid' to get useful outputs from the models, but with some direction, it is feasible. Or (even better) would be for Brad to add them to the database. I know that what is in the system are the most common, but there is no inclusion of sodium/potassium metabisulfate (included in Bru'n water) or something left field like calcium lactate (mixing lactic acid with CaOH) to up calcium without adding sulfate/chloride. Some people even use citric acid....