The answer is: clearly not.
Why is this the answer? Because you (nor me nor anybody else) can define what these terms means for COH2 Balance:
- Consistent (across what and when and where?)
- Cost for benefit (decided by whom????).
That's a very loosely defined and weak argument according to which you basically never need to update any game.
There are clear objective parameters such as cost, performance etc available to sketch out a rough idea. The rest is up for testing. Cost and benefit of an ability can be determined the same way literally all units and abilities have been balanced. Just play test.
If no one could ever properly say that something is too cheap or expensive for what it does, we'd never have any balance update.
There's definitely means to make things more consistent in CoH2, the points you made in the post above have no real argument behind them.