I disagree. Remember, your loop is likely to be at ambient. So, even the odd leak at the bottom of the lung shouldn't be disasterous. On my MOD 1 my dil inflator came undone (bad technique taken from the Internet - you have been warned!
) and although it was a damp, gurgly breathe, it was some minutes before I thought I
ought to bailout, rather than actually needed to. The water entered only to the point where it was equalised, if that makes sense.
I've cleared water from counterlungs before by gripping onto a rock with my knees and adding dil to the CLs. I then unscrewed the injector and crushed the lungs until the water was all out and bubbles started to come out of the injector hole, then replaced the injector and carried on.
So, for Genesis; what might be useful is a dump valve or something easier to operate than unscrewing an injector, set low into the lungs. I suspect clearing them mid-water would be do-able as long as it was done slowly and carefully. To clear the scrubber you are going to need another dump valve in the bottom of it as some rebreathers do already. However, that might be a hole too far - if that's leaky then your risk of a cocktail massively exceeds the risk of needing to empty a flooded loop and also requires you to bailout. I think even those who have been diving for decades have only experienced a couple of floods, and IIRC, the worst part was the cocktail that came with it. So for my money, I'd want to be able to empty counterlungs if necessary but wouldn't want any extra compromising of the scrubber. You can always roll and move water from scrubber/hoses into the counterlung should you need to.
HTH