UGH. I spent a lot of time writing a response and it has been lost (apparently) What a day.

Rather than write the response again, I keep it short.

You will not need those items mentioned, unless you are recording music, or require some fancy EQ or routing.

Here is a note about the Mute/Alt 3-4 item mentioned, from Sweetwater.

Regarding the Insert capabilities of the X2442USB... The X2442USB that I use has the ability on the first 8 channels. Maybe take a look at the info on Behringer's site for more detailed info.
Inserts and direct Outputs on each of the mono channels.