I think the mechanic should allow the LJ/HL and crew to alter their starting position to their discretion, based on the length of the kickoff. It might be different for each team. A wing on, say, the 20 that sees a kick coming back toward the pylon SHOULD have enough time to get back in time to rule OOB or touchback. The R can come over and help out.
We worry too much about the pylon and really, how many times does that actually happen as opposed to things like shorter kicks, KCI, fair catches, spots, potential fouls, etc.? This reminds me of basketball where the Trail official "bails" on a shot because he's worried about a defensive rebound leading to a fast break and getting beat. Meanwhile, he takes himself out of getting a good position to rule on potential calls that have a better chance of occurring than a hypothetical that may never occur.