As a 1st AC I'd definitely prefer something with a quick detach system vs. screwing it in to this plate to secure it and having it fairly inaccessible to access the menus or ports. Plus Teradeks can get really really hot, and turning the whole back of your camera rig into a heat sink might not be very comfy.
I picked up this smallrig quick release mounting bracket recently and it's been working well. (Amazon Link) I mainly use it to attach the receiver to my 1303 but I'm going to pick up another one to attach TX flush to the side of the camera (could also be mounted on the end of the top handle). Theoretically if I got multiples of the bottom attaching bracket, I could place them over the camera where I'll need to move the teradek (studio mode vs steadicam vs handheld etc), and then I'll be able to quickly move it around the camera without fussing with Allen wrenches or magic arms.
Then I got these white stubby antennas called Foxeer Lollipops v4. Very low profile and don't get in the way or snagged on anything, and the connection has been just as good if not better than the OEM antennas as far as I can tell.
It's really all subjective though, you might find that you buy this and it suits you perfectly.
