Haha, a salamander is definitely possible, though the core party is pretty close to done (hopefully...). ut I like salamanders, was actually talking about it as a possible future monster girl earlier with a friend, though I'll stress there are no specific/set-in-stone plans for one currently.
The beta thing is pretty new, usually I only do some testing before release. The last few betas I've done have generally lasted around 3-4 days, and I usually work during the beta to add a little extra. I want to release as soon as possible, but I have to hit my personal minimum content quota (no glaringly unfinished stuff) and get through the beta without any major issues.