You had me in the first half, not gonna lie.
But srsly, immersion diuresis is generally much less of an issue if you dive dry. If you normally can hold it for an hour or so, you may well cope quite nicely without a pee valve on normal no-stop dives. At least if you can take a leak just before zipping up (which I usually make sure to do). I can comfortably count on one hand the times I've felt the yellow rising in my eyeballs before I was on shore or aboard and could zip down to take a leak again. Even if I usually get the urge rather dramatically about 45 minutes into a wetsuit dive. Almost no-one I know who dive exclusively no-stop has installed a pee-valve on their drysuit. And they don't seem to miss it.
If you do extended dives with long(ish) deco stops, that of course changes the equation quite fundamentally.
Or dive in places without bathrooms close by