I have to say that increasing complexity has been a deterrent for playtesting... Friends from our old 3e gaming groups simply did not want to playtest because complexity was too high, and they were 3rd edition players! I only managed to run some 5e games with other friends & relatives, nearly all of them being casual players or totally new to D&D, and I managed that only by stripping out a portion of the character options (races, feats/specialties) and only up to 3rd level.
WotC designers keep talking about complexity, but they seem largely focused on character creation/advancement complexity. Clearly, this is indeed an issue because if too high, it can become a barrier for new players to even start. Very few people can be intrigued into the game, if it takes 2 hours before you start playing, so it's definitely a good thing that they are providing options for faster character creation and levelling up.
But this is only half of the problem. The other half, is having characters with 10+ possible own special actions to do at each round, half of which are circumstantial. This requires a lot of effort, you need to be aware of what your PC can do (and I'm not talking about what a normal person can normally do, i.e. moving, jumping, climbing... I mean specific actions/abilities that only your PC has, or specific reasons why your PC should more often take a basic action), and you need to be aware of a list of circumstances/conditions when it's the right time to do that.
If they are currently testing "Standard" and instead "Basic" is not visible in the rules, they should better say it out loud, because clearly there are people who get the idea that 5e won't really be for them, and they are leaving it behind.