While it's technically possible to have all 14, 15, whatever subsites in a simulcast in failsoft I think it's a bad design. If subscriber A only gets into subsites 1, 2 and 3 units close to other subsites may not hear the traffic and talk at the same time on subsites 9, 10 and 11, causing bad interference in overlap areas.
In a single zone LSM build, it makes perfect sense, considering the fleet mapping. In our case, several users/stakeholders we dispatch for roam the
ENTIRE zone whereas some are geographically separated. When we designed the failsoft plan, we did try to geo-isolate the users from each other failsoft frequency wise. But when you only have 11 channels to work with, you're going to have some people on failsoft frequencies sharing with each other. In this case, we did this by agency type/response plan relative. (In other words, we have SO, which is a countywide entity, sharing F/S with our county marshals, school police, etc which are all countywide ops wise and law related and often back each other up on high priority calls).
This was the most difficult stages of fleet mapping for our agency.
Ah, DSR is such a wonderful thing if you're lucky enough to have it!
Must be nice to be able to afford it. Out of all the Astro 25 deployments in my town, (13 or so), only 1 has DSR (take a guess, the one with the most money)