Right now they are nothing but a recolored, slightly larger blue bug with a SHITLOAD more hps.
This is NOT what a behometh is supposed to be!
1) These were supposed to be introduced so that the number of bugs per base could be VASTLY reduced.
From what I see, they contain the same number of units and half of them are now so called behomeths.
This just creates the same amount of work on the cpu, network traffic, etc etc and provides NO benefits.
At least before these I could kill a base with 24 top tier drones and my favorite weapon!; Now I have to spawn 3 sets of those 24 drones just to finish of that middle sized base.

2) A behometh is supposed to be HUGE; not a tiny little thing that moves just as fast as the flimsiest bug in the game!
Make them as big as an entire colony spawner!
Make em move slow as molassas in January!
Make them small in number!
Make them have higher resists, but only progressively higher hitpoints then the lesser tier ones (not exponentially higher as they are now).
Make them actual siege units specialized for breaking through walls with a low use ranged acid glob and a powerful melee attack.
Make sure their defences still have a hole of laser and electric resits, so that high tech defences can take them down fairly fast.
Make the ai move together, so that a real behometh can do it's job and then let the little guys swarm in around the breach it makes.
Right now the so called behomeths are just a waste of time and space.
