I always find it interesting when people start suggesting that a dev start "working with a team" because they seem to think it's super easy to do this, but it isn't.
For starters, some devs like DPC are doing perfectly fine on their own. This game gets regular updates roughly every 4 months and the level of content is far beyond almost every other game that releases updates in the same timeframe, so it's not like he's struggling to get substantial updates out in a timely manner like some other devs I can think of.
Secondly, working with others means not only paying them out of your own pocket, but mainly it's about finding others who are on the same wavelength as you with regards to understanding not only your vision for the game, but how to produce content that is at the same level as the dev and at a similar pace. That's probably the hardest part of collaboration in this business because unlike in other lines of work, you can't really afford to be spending time essentially getting someone trained up to the proper level.
Lastly, even if you could find someone, there's no guarantee you'll find them living in the same area as you which means you might end up with someone in another country which makes communicating back and forth that much slower than if they were there with you in person. So really, all this would be a hassle to DPC right now and they don't have any reason to be working with others since the solo act is working fine for them right now.
The main reason why I think people want devs to work in teams is because if anything sudden were to happen to the dev, it might mean the game's future is put in jeopardy, but if they had a team then at least there would be others who could carry on. So it's less about wanting them to work with others to increase production times, and more about the worry of the game not being completed if something happened to the dev.
If I recall correctly, DPC had a poll about VA, and most of the people deemed it 'not so relevant' or unimportant. I agree tbh, ofc you don't have the voice of a particular character, but, at least for me, it doesn't take anything away from the experience. Certain facial expressions (smirks, grins, etc.) set a good tone for the characters in general
Which is good because voice acting in these kinds of things is overall pretty crummy because it's basically just a bunch of canned moans, groans, and fake orgasm noises that generally don't sync properly with the animated scenes they get attached to and generally sounds terrible.
I honestly dont get why people feel they need these noices anyway because if seeing these hot scenes isn't enough to get you off, then I don't think a few moans and groans are really going to help much.