I've corrected this. Thanks for pointing it out.
The suggestion is now open for voting at: https://panel.dreamhost.com/index.cgi?tree=home.sugg&category=_all&search=PS+swap
This is simply not the case. While changing the numbers is easy enough, ensuring that this will not negatively impact the stability of existing PS hosts is difficult.
I'm quite aware of how swap works under Linux. However, as noted in the link I attached to my previous post, the meaning of "swap" under Linux VServers is different from what it means under physical hardware. While the host machine does have swap space available, it isn't directly exposed to the guests.
Really, we'd prefer you didn't think of it as swap space at all. Think of it as a bit of bonus memory you can use in emergencies.
If your site needs more memory than you currently have allocated, allocate more. Burstable memory ("swap") is not a substitute for increasing your allocation - in fact, running processes in burstable memory will increase the number of 500 errors you get, as processes running in burstable memory are killed first in low-memory situations.