Nope. At first i had no idea what would happen if somebody landed a dropship next to my HQ, but i gave it a try and waited to see what would happen. I got my answer on the second attack. (about half a year ago by now) They just walked away towards the outer ring. Not sure what it was they where prioritising, but it wasn't my HQ
The trick is to attack in (at least) 2 directions (& use troops to attack buildings in a row along the edge) to clear a 'gap' wide enough to drop troops, typically from a corner, or at the middle of an edge that will target the HQ as closest. By that time they are getting close to clearing it for 45% already. (if they get that far)
Juggernauts frequently drive around in the stump field close to the HQ, but it hardly ever happens they attack it. They don't live long enough to destroy all shields in most cases.
Most cases where my HQ does get destroyed, the attacker managed to knock out 2 corners, and either troops from one corner or new/other troops who attacked the building in between, are the ones to wonder off to the center. The heavy/medic combo is among the ones doing so most often, but totally depends on how the attack is executed.
I allways have speeder bikes up my SC for defense. Already being the best choice at all, they work verry well with the design, moving around the place freely (walls don't affect defending units). Ones triggered it usually is over soon
My biggest ally in this design is time. There is hardly enough time to execute the attack needed to defeat it.
Another good thing is, on tatooine i only get attacked 2 times a week on average
For the last 2 months or so, since i got my trade ports to level 7 and higher, i'm actually capable to 'farm' CB up to 100k+ fairly unmolested and without constant grind, thanks to it.