Sort of. I think their game still feels very early accessey - I'm hoping there will be a decent amount of focus on fleshing out the base game (vs adding paid DLC). Things like adding more coat variations, making the community events suck less, redesigning the animal market, improving exhibits, fixing the bugs everywhere, etc.
These things are not mutually exclusive. Game developers don't focus their entire team on a single thing at once - DLC will be developed at the same time as updates to the base game, as demonstrated by the Arctic Pack (they didn't churn that out in the short time between 1.0.5 and 1.1, after all).
I also hope at least some of their DLC team is working on swimming, diving and flying, so we can get marine & aves expansions at some point.
I wouldn't get your hopes up over true flying. Unlike swimming/diving, true flying is extremely difficult to animate outside of a specific path. A looped animation is entirely possible, like the pterosaurs in JWE (and, IMO, more plausible for PZ), especially if they're working with a pre-designed aviary like an exhibit. Diving and swimming are still difficult, mostly due to the insanely big hit-boxes most of the animals have, but there are less variables to deal with in an underwater environment than there are in an open-air one (largely due to the lack of foliage and other obstacles).
(lets face it, at least a couple of Australian animals should have been in at launch).
This was undoubtedly deliberate.
I'm reminded of the trainwreck that was
Zoo Tycoon 2013. That was a Frontier game as well. The first version had exactly zero Australian or South American animals, so they released the
Ultimate Animal Collection which added four new "habitat animals" (at least that game's version of them) and a bunch of "mini-exhibit" animals. We got the kangaroo, jaguar, puma, and llama (all of which included a bunch of reskins marketed as different animals). I wouldn't be surprised if they were planning a similar addition to PZ, hence the conspicuous lack of Australian and South American species, especially Australian.