Don't get me wrong; we'd love to do MK8, but sadly the market of people that have WiiUs is really low. Venom is the only one of us that has one. He's also the only one that has a capture card, and then we'd have to transfer the raw footage for Var to edit and...it'd be a lot of work. We'd also have to actually meet up in real life for that to happen, since he has the capture card and the console, so that's plane tickets and hotel rooms for one LP. Probably not going to happen anytime soon... =P
Don't get me wrong, I get your frustration...but this is just one of those things that you don't get until you're working on production. One big thing is the schedules: sometimes, we'll talk about an idea that we all want to do, but then we have to wait until everyone is online to do it. Everyone has school and work now, and we also have the international to worry about (Viper and Exx are overseas). We're also working on a bunch of behind the scenes stuff too; the website was a big one that we've been working on for a while.
That's not to defer criticism, because videos that do take too long is something valid; but it's also one of those things that sounds easier to do from an outside perspective and you only get to realize how difficult it is when you're actually doing them.