If trenches could be used by everyone then you have to give some thought to where you place them and if you over extend your decision bites you in the arse. Its core coh2 doctrine. But not anymore because the game has to be retard friendly. Don't want anyones feelings to get hurt because they can't master coh. Seriously, just fucking hell.
So much of what relic does is just short sighted and poorly thought out. Usf morter anyone. No one wanted a morter except retards that basically want everything ( but thats another thread ). And no one wanted a rapid fire morter where the second shell fires before the first one lands. And no one wanted more indirect fire before gren wiping was fixed.
Trenches should be neutral. They should either be like the Ostruppen doctrine trenches if free or directional trenches if not free.
If a player is paying for trenches then one of the following should apply:
Trenches give green cover from one side and but just yellow cover from the other side (there are some maps with this already)
Trenches give them green cover from both sides but don't allow units to fire out the other side.
Also, trenches should be able to be destroyed using the COH1 mechanic of de-capping
Someone made a Competitive Mod (or something like that). I like how the tiers in that are organized much better than the regular game. The All Units mod is also pretty good. In short, it would be better if the core units are all competitive and the commanders just add a different flavor to the play.