As an experienced AH Ki-84 pilot I beg to differ.
The King Tiger we have, is flawless - unlike what was coming out of the factories in late 1944/1945. Shady welding, cracks in the armor - Engines that simply couldn't put out enough horsepower to keep King Tigers going for 10 miles straight without breaking down, yet in Aces we have a Tiger with perfect armor, can drive across any terrain without breaking down.
As for the HE-162, it shoudl be made the same way - I can see the durability being quite good, mostly made of wood. However the biggest problem is the engine being mounted so obvious, it wouldn't take much to put a He-162 out of action, think of how easy an Me-262 gets an oil leak, imagine having that engine mounted on the top rear where most deflection shots are going to hit?
HE-162 will make a nice boom and zoom fighter, if you get caught its going to be easy to shoot down. Thus being said, it depends again on the pilot - used correctly its 15 minute "Fuel" timer in the Main arena would be extended to 25-30 minutes climbing to alt and using cruise speed.
The only question I have is, there were only 1-2 kills with the HE-162, The squadron in service - did not have any gas to fly any combat sorties, does it make the cut to being added to Aces? no more then the Pershing tank does, but both can still be added.
It would get added in my opinion, however its so down on the list, I would put the Panzer II above it.