From: Leeuwarden, Netherlands
Yup, looking fine to me too. Except that I do have some things to say
The HQ (of an Armygroup) covers 7 hexes with 100 HQ bonus, each hex more distance to that HQ will diminish that HQ bonus with 20%, so add another three hexes on both sides of that HQ makes 7+6= about 13 hexes. So a HQ can cover about 13 hexes with it's HQ bonus. If you want to create a frontline with units that can sustain an offense (say all the armour and artillery and so on) you need about 200-250 staff in that HQ to make it 100%. Ofcourse you can make the HQ smaller, which I often do on quiter parts of the gamemap.
Like 82ndtrooper I keep my Engineers in separate units, Flak guns too. I tend to make Flak units of 10, give them some horses, or whatever, and keep them in the middle of my units, just behind the frontline. I did notice however in my last random game, where I had a very long and tough battle in jungle/forest, that Flak can be quite deadly Tank-killers in dense terrain. I tried to nail the AI lighttanks with lots of Submachineguns/bazookas/AT guns, but it still cost me a lot of Inf. Then I added some Flak guns and whaddyaknow? They die much faster than without Flak guns.
I do give my armoured units like 10 Inf extra to give them some extra protection against Inf units, and some extra recon. I usually make recon units, 4-6-8 recon armoured cars, great for encirclement, and for uhm, recon. ( damn, wish there were more recon variants, they were used widely after all)
That armoured group HQ you described can only cover three hexes or so. It's made of 7 units (not counting the engineers and training unit) and you can place two units in one hex to maximize the punch you can have from attacking from one hex (hmm, that was a bad sentence.. LOL), I mean to say, you can attack with 100 points from one hex (or two hexes) without stacking penalty. So that HQ can only cover a very small portion of the front, in case of tough resistance that is. If it's only recon in force then you can spread your forces more easily. The AI, and certainly a human opponent will make use of holes in your front though. But that's my experience, and way of playing. Yours may vary ofcourse.