Funny that you say so.
Eric's Poker "minigame" was drawn in December 2016 and had different characters available but this hasn't been implemented yet, even after Eric's mom update.
You can't invite anyone despite the art for other characters (at least Rhonda and the school monitor girl are drawn) being ready.
Back before Sister's update, DC ran out of things to draw because the art was ready (said that himself), yet the coders delayed the update released for over 3 weeks. When the update was released, the coders names were removed from the page.
Now, the update is further delayed, of course Patreon has its faults, but still, this update still hasn't seen the light despite 3 months over and even before the "patreon takedown" the update was still not halfway done.
In the meantime, we saw in the streams characters that had nothing to do with the update being drawn naked (Eve, Rhonda and the Principal) or doing poses that probably aren't going to be featured. And don't say they're going to play a role those drawings, because we know it's not true, the characters like Eve, Judith, the Principal and Rhonda will have their own update.
DC is a professional and skilled, he's capable of drawing quickly and well, i give him too much credit to think otherwise.