WAN Show setup suggestion.
To @LinusTech and @Slick
So you're talking about switching out of explit to OBS because of compatibility with capture cards and whatnot but I'd like to show you an alternative that makes more sense for the kind of show that you run with lots of inputs from multiple sources.
Right now you're using explit as a software video switcher which is kinda okay and historically was a vastly cheaper way to do that kind of production than having a hardware switcher but recently Blackmagic has brought the price of a traditional broadcast hardware switcher down considerably and I think that moving the video source switching to a dedicated specialised device would be a more elegant solution - taking a lot of processing away from the CPU of your stream computer and relying less on USB devices with lots of drivers that are constantly getting driver updates and running into problems with windows mandatory updates and updates to your broadcasting software.
The way I'd suggest you run the setup is by having your BM Production camera, your laptops and whatever other sources you want to input go into a 'BlackMagic Television Studio HD' where you'd setup all of the scenes you want with lower thirds and picture in picture effects. Then run the SDI out of that hardware switcher into to your streaming device through a capture card that accepts SDI (BM do a bunch but I'm sure there are others). This way explit/OBS and your processor would only be responsible for taking that one video in, combining it with audio and encoding it to stream to twitch. You're not relying on janky software but a professional hardware solution that's a slightly cut down version of what they'd use on something like a live news television broadcast and it's actually pretty cheap at around $1000 (but you can find it a little cheaper if you shop around.)
Don't know if this would help or not, It's a different way of looking at the same problem.
Link to Blackmagic product page: https://www.blackmagicdesign.com/uk/products/atemtelevisionstudiohd