So the stat squish is the most minor part. The effort of putting a patch together, and then doing QA, applies to any new content. Male viera, or anything else. As someone else said, it's not how SE rolls.
There are companies that play it fast and loose. For example, the creators of Warframe are known for suddenly dumping things on their live servers, and then things break and they rapidly hotfix stuff for the first few days, and slowly refine things over the course of weeks and months. So in this way, the whole playerbase are beta testers, and I have friends that won't play a new update for 2 months or so because they want to experience it as intended, ie the fixed version.
SE's modus operandi is very different, of course. They have a process they follow, so a lot of our content is well-balanced from the start and it's rare - not unheard of, but rare - that there's a critical issue during the launch of new content, expac or otherwise.