Yeah, they are defensive because soviet and ostheer factions are dated after Kursk and that was the last major german offensive action on eastern front.
As for numbers it is true that relic gains all kind of information like win ratios, most build units, most played factions and so on. What they are coming to the formus is mainly finding bugs and ideas not the mere information about the state of the game.
The only thing that triggers me about allies right now is the infantry sections. With the ability to dual equip LMG's, have 5 man squads, better veterancy, and having the ability to build cover/trenches. Are cheaper to reinforce than grenadiers.
Well, giving IS a bren is a bren given to your opponent so you know, not the best idea. They drop even more than guards. It is far better to give lmgs to sappers and here is sth you can call a problem in team games.