Yes and no.
TLDR(Too Long Didn't Read) At the very bottom.
I don't recall for 100%, so you may be right about this, but I'm pretty certain that if you wanted a Brilliant Victory in say... the D-Day scenario, you had to occupy those 4 odd victory hexes available in lower England. Even in those scenarios, holding the line was just an Axis Victory, it wasn't a purely defensive scenario.
Taken from:
http://www.panzergeneral.org/PGtxt.txt
D-DAY
No. of Turns: 15
Battle Posture: Axis = Defense Allies = Attack
Per Turn Prestige Boosters: Axis = 0 Allies = 100
No.of Units Available for purchase: Axis = 1 Allies = 1
- The Allies only need three objectives to complete the
scenario and Caen is suspiciously close to the shoreline and is
capable of being shore bombarded by battleships. The most
difficult objective is Saint Lo in the south due to the rough
terrain in the box country and the difficulty in getting good
units to the position. Time is still on the side of the Allies
because of the low objective count.
No. of Objectives: 5 Axis: Hold 2 Objectives.
- Two objectives are in Great Britain and already guarded so
these are fairly secure. I suppose a German player can launch a
de facto Sealion but it is probably a waste. Caen is within
range of long range battleship guns and the hexes around it are
vulnerable to cruiser fire. Cherebourg is difficult only in its
remoteness. Saint Lo is the most difficult objective because of
the terrain surrounding it and the ease of its defense.
If you are just playing the D-Day scenario, it doesn't really matter if you have a victory, or a brilliant victory.
However, if you are playing a campaign and you are in the D-Day scenario, I believe that the difference between a victory and a brilliant one changes the path of the campaign.
D-DAY: LOSE/MINOR Cobra
MAJOR Anvil
My problem with PG was even in this 'defensive' scenario, you were still on the
offensive if you wanted that brilliant victory. I'm not hung up on the word 'brilliant', I'm just pointing how out that type of victory influences the course of the campaign, and thus your play style as well.
Maybe this is just me, but if I would imagine a purely defensive scenario, it would be more like:
A scenario fighting on the banks of the Vistula River. Along the length of the river, there are bridges and other crossing points, each of which is a victory hex. A brilliant victory would be to have control of all these victory hexes at the end of the scenario. Normal victory if you lose one, tactical if you lose two, loss if you lose three or more. This is more of a purely defensive scenario, where previously it would be more like 'go on the offensive and capture some VH on the enemy's side of the river'.
Think of it like this.
If you have to capture 100% of all VH before a deadline for a brilliant victory, but you do not control all the VH at the start of the scenario, there is a need for offensive action. This means that there has to be a way for the player to go on the offensive, probably meaning the enemy is so weak with their offensive, that it allowed the player to go on the offensive.
If you have to hold all the VH you start with to earn a brilliant victory, it changes the entire course of the scenario. In the previous example, assuming you went on the offensive and captured the few VH you didn't start with, I would imagine the map at the end of the scenario would look very barren. A lot of your units spread over the map, but only a scattering of decimated enemy units. I picture a true defensive scenario where at the end of the battle, the map is still jam packed full of enemy units, but you successfully held off their attacked and bottled them up so completely that you earn a brilliant victory.
To me, even though this is a game, feels much more historic and realistic.
When Barbarossa was launched in 1941, did the Germans massacre every single Russian unit they came across? No, they outmaneuvered and pinned down huge pockets of soviet troops. The Soviets won the battle of Kursk, but did they win because the Germans were completely wiped out? I would like to see a little more of that sort of that in Panzer Corps, but maybe that's just my image. If it is, I guess I'll be glad there's a custom campaign editor with PzC, right?
http://en.wikipedia.org/wiki/Battle_of_Kiev_%281941%29
The encirclement trapped 452,700 troops, 2,642 guns & mortars and 64 tanks, of which scarcely 15,000 escaped from the encirclement by 2 October. Overall, the Southwestern Front suffered 700,544 casualties, including 616,304 killed, captured, or missing during the month-long Battle for Kiev. As a result, four Soviet field armies (5th, 37th, 26th, & 21st) consisting of 43 divisions virtually ceased to exist. The 40th Army was badly affected as well. Like the Western Front before it, the Southwestern Front had to be recreated almost from scratch