Personally one of the biggest things I like to see in zoos is a diverse collection, with large carnivores, primates, ungulates, small mammals, birds, and herps- as well as seeing animals that I don't see very often at other zoos. In order to achieve this, I believe that the AZA has sometimes picked the wrong species to phase out- particularly amongst caprids.
That's a fine opinion to have, but it's important to note that this is a personal preference of yourself and not actually a problem with species management. If you had framed this thread as one where people simply offered their opinions on what species should be prioritized or not based on their own preferences and opinions, that's one thing; it's another thing entirely to claim that something is wrong with the program selection process and needs to be changed.
there are currently too many species managed by the AZA and not enough space in zoos to manage all the species currently managed. However, I also simultaneously see that some species, like red panda, ring-tailed lemur, and meerkat, are as common as dirt in zoos and could have a decrease in population and still be viable.
Yes, there are inbalances between overly common species and smaller, struggling populations. The inbalances can be due to a number of factors and variables regarding demographics, institutional commitment, history in captivity, ease of breeding, availability, etc. Oftentimes populations struggle to grow for reasons other than space availability.
If the AZA was to phase out one of the tiger subspecies, more room could be dedicated to the Malayan tapir, sloth bear, or dhole- giving more space to three programs currently struggling.
I completely understand that the AZA doesn't have the means to manage ten Caprid species, but it would be nice if the AZA took space from other species and dedicated it to caprids- so that maybe three or four species could still be managed instead of one.
@Zooplantman's response to you about this is pretty much in line with what I was going to say, but I'll offer this alternative explanation in case it helps you make sense of things.
"Space" is determined by demand. If all zoos in AZA collectively want and have room for 300 tigers, then the available space is 300. Programs are chosen and managed based on what space zoos offer to them. If there's room for 3 subspecies of tiger, then that's how many subspecies they can try to manage; eliminating one of the subspecies doesn't automatically allow space to be re-allocated to Malayan tapirs or dholes. More likely (as has been pointed out) it would just lead to increases in one of the other two tiger programs... because zoos demand tigers. The AZA can encourage or advertise struggling species to try and make more space for them, but that's pretty much it; if the demand isn't there, then the space isn't there - and you can only make plans based on the space you actually have to work with. The TAGs can give population targets above or below available space, but this would just be an attempt at encouraging zoos to re-prioritize; it can't be enforced in any way.
In other words: it's not just a math equation. The TAGs can't subtract space from tiger programs and add it to tapir programs, because they can't take a zoo's tigers away and force them to get tapirs instead.