I've always preferred the Wehrmacht's way of veterancy research to the Panzer Elite's. I feel like it requires more strategic thinking given that it costs resources to upgrade a unit and each unit type has its own tech tree. That said, I think the Ostheer can implement something similar while maintaining a unique identity. Heres my idea: The Ostheer has a buildable research structure, the Waffenamt, that can be built at any point in the game and rebuilt as many times if it is destroyed without losing previously researched vet.
The Waffenamt has four research categories with two veterancy tiers that adds a junior officer or NCO to that particular unit. (Whether or not the officer is shown on the field I leave up to the devs.) Each vet tier gives a particular kind of bonus only to a select kind of unit of a particular category. For example, Infanterie Feldwebel I only gives a bonus to light infantry and light crewed weapons. Infanterie Feldwebel II only gives a bonus to standard infantry and heavy crewed weapon teams.
Tier 3 veterancy upgrades are doctrine specific that give a bonus to the doctrine specific units and a unique bonus to other units in their respective categories. These are researched at the Gebirgsjägerschule (Army Group North), Panzertruppenschule (Army Group Center), and the SS-Junkerschule (Army Group South).
Waffenamt (Research Building.) 100MP.
Armor Research:Panzer Leutnant I -Armored cars and Panzer IIs are led by a junior officer. Units are less likely to receive mobility damage. (200MP. 25Fuel.)
Panzer Leutnant II -Panzer IIIs and Panzer IVs are led by a junior officer. Units are more accurate and damaged engines are repaired slowly when the panzer is idle. (250MP. 35Fuel.)
Infantry Research:Infanterie Feldwebel I -Infantry are led by an experienced NCO. Increases the combat effeciancy of Jäger Truppen and MG42 teams.Jäger Truppen are less prone to suppression and have a greater line of sight. MG42 Teams take less time to suppress infantry. (250MP. 25Fuel.)
Infanterie Feldwebel II -Increases the combat efficiency of Grenadiers and Mortar Teams. Units are more accurate and have more health. (250MP. 35Fuel.)
Engineer Research: Pionier Feldwebel I -Panzerpionier units are led by an experienced NCO. Base structures and defenses are built at a slightly faster rate. (150MP. 10Fuel.)
Pionier Feldwebel II -Panzerpionier units build sturdier structures and defenses. Base buildings and light defenses have more health. (200MP. 20Fuel.)
Artillery Research: Artillerie Leutnant I -Artillery crews and AT crews are led by a junior officer. Increases the combat efficiency of sIG33 Guns crews and PaK 40 crews. Units have a faster rate of fire. (200MP. 25Fuel.)
Artillerie Leutnant II -Marder II crews are led by a junior officer. Units have a greater line of sight and are more likely to score disability hits. (200MP. 30Fuel.)
Gebirgsjägerschule Gebirgsjäger Infanterie Leutnant -SS Mountain troops are led by a junior officer highly experienced in mountain warfare. They are not slowed by rough terrain, are less prone to suppression, and their squad sniper can slow enemy infantry. (300MP. 30Fuel.)
Gebirgsjäger Artillerie Hauptmann -Gebirgsgeschütz 36 Gun crews are led by a mid-level officer experienced in mountain warfare. Artillery crews are very accurate, have a faster rate of fire and shorter cool-down time. (300MP.40Fuel.)
Belagerungpionier Leutnant -Belagerungpionier units are led by a junior officer. They build light and heavy defenses faster and more durable than Panzerpioniers and can repair buildings much faster. (200MP. 30Fuel.)
PanzertruppenschulePanzer Hauptmann -Panzer III, IV, and Tiger I crews are lead by an experienced officer. They are highly accurate, have a faster rate of fire, and crews will automatically initiate field repairs when the Panzer is idle and has less than 50% health. (300MP. 45Fuel.)
Panzerschützen Leutnant -Panzerschützen units are lead by a junior officer. Squad LMGs can suppress, slowly heal when idle, and are more likely to score mobility hits when using the Panzerfaust. (300MP. 30Fuel.)
SS-JunkerschuleSSTruppenoffiziere -All infantry units are led by an experienced and tough SS-Obersturmführer. Infantry units are highly accurate, very hard to suppress, and will receive less damage as squad members are killed. (300MP. 45Fuel.)
Army Group Command Ostheer Concept http://easternfront.org/forums/index.php?topic=3702.0
