I have an MK4+MMU that I bought partially with the intent of building PLA-supported PETG and TPU parts. I haven’t dug in too far yet but in the few prints I’ve done the PLA has severely degraded interlayer adhesion. Presumably this can be addressed by purging (much) more on changes from PLA, but if I had known this before I bought, I would have seriously considered a multi-head printer.
A drone operator usually is not standing directly under the drone, so no. Or alternately, the drone if probably further away from you horizontally than vertically during most of its operation.
One interesting thing here is that, for a given altitude, the antenna gain will be higher the further away the drone is.