Of course there is a safer time to bot. People who don't realize it are in denial with the excuse of "its never safe blahblahblah". Come on, be grown up boys. Stop using premade sentences that provide you with a FALSE sense of insecurity.
First, actual Hb version is a TEST Release. Go to the thread , and check the Currently Known Bugs list. It is far from working adequately, and further on, many of those bugs could be used to identify botters. In safety terms, TEST<BETA<Release. If you care about doing your best for your accounts to last, Do not bot until a release have been provided.
Second, many plugin authors refuse to update their work until a release is out, for changes could force them changing the addon again in no time. No one can blame them. Therefore, many addons that are intended to provide a safer environment by making you appear less bottish, reply to whispers, avoid other players, etc, are not working.
Third, the amount of people botting is lower than the usual amount by a huge margin. So, the GM's in charge of manually looking for botting accounts have a higher chance of grabbing YOUR accounts as there are not so many others in the pool.
In short, this is probably the less safe time to bot.
At the very least, wait for a Release to be out, and for safety, give it a couple weeks to clear bugs. And with the expansion arriving on a week and a half, it would be dumb beyond belief botting now and getting banned , when with the new expansion new profiles will come out, meaning some of their methods for identyfing account will become obsolete, lots of player back means a LOT of work for Gm's , so they can devote less to finding botters, and the price of gold is expected to raise substantially with the increased demand.