Trapper.
The facehugger loses the capacity to jump and hide but aquires the capacity to burrow itself in weeds. Should have a long cooldown of maybe 30 seconds and should look and work much like the resin trap. Marines step over the trap, removing it, getting stunned and reveals the hugger.
This would trivialize the T2 Carrier
How? Even with high xeno count there can be around only 3(I never saw 4) facehuggers active. Even if they all take the Strain its only 3 stationary huggers meanwhile a Carrier can make in one trip 16 Traps.
Sounds like it could be fun, planning ahead of someone moving to trap them, although Xenodevs have the habit of nerfing huggers everytime a hugger solohugs them 
if they play marine then they aren’t xenodevs
Contributor = XenoDev, thems the rules.