Can I replace a EVO 1-5-U/U with a EVO 1-5-U/P ?

My xfinity system (TV, internet with my modem and my router, no voice) has a EVO 1-5-U/U amplifier. My main TV has a full size cable box, other rooms have small boxes but can set record and view saved recordings from them. My question is this...is active return on the amp (-U/U) required for my system? As a possible replacement, I have access to EVO 1-5-U/P with passive return but per the specs it has 10.5 insertion loss on return signal. Does my system utilize return path? And if so, does it have to be active (-U/U) instead of passive (-U/P)?

My EVO is powered with standard powering with power going from the coaxial power supply directly to the coax power port. The install tech connect the coax going to my internet modem to one of the regular outputs (as opposed to the passive output) I assume because that run has a 2-way splitter at the end since that run feeds both a TV (small cable box) and the internet router. All TV locations are connected to regular output ports as well. As mentioned, my modem was purchased by me, selected from the xfinity published list of acceptable modems, and is internet only, no voice. All modem connections on the install drawings for the EVO show modems connected to the passive -3.5dB port, but since it has the 2-way splitter at the end of the run, is it correct and acceptable to have the modem connected on a regular output port?

My main household distribution box for cable (where the EVO is installed) is in our master bedroom closet. We've recently been experiencing short freezing instances and pixelation issues once or twice a minute on the master bedroom TV. I've swapped TVs with another room, small cable boxes with another room, tried a new HDMI cable, tried a new RG-6 coax jumper from the wall to the box, made sure all the copper ends on all the coax connections in the run are clean and not oxidized, and even opened the main distribution box in the closet and ran an RG-6 coax directly from the EVO port that normally feeds that run across the floor to the cable box and still get the issue on that TV. I originally suspected low signal at this outlet, but this TV is the shortest coax run from the EVO (being just across the room). Two other TVs that are farther away don't have the pixelation issue. Could it possibly be that my incoming signal has increased slightly and now the signal to that TV is maybe a little high causing the issue? 

Full disclosure, I used to work in the field for a low voltage company and one of our systems was MATV (from multiple antennas on a tower). I'm familiar with distributing amplified TV signals in buildings like schools and testing dB levels and adjusting slope etc, but no longer have access to the tools to read the actual dB levels.