Really? I haven't found much use for British trenches on most maps with the changes to flamers. Units in Trenches seem to die very quickly from mortars and ISG as well due to the clumping of the units inside. I prefer ambient buildings myself, and even sandbags to an extent.
Then again, could just be bad RNG for me.
They messed up the way explosives damage world structures meaning that buildings are far, far more durable than they should be.
Also just to throw this out there the buff Brace gives you is you only take 25% normal damage (in essence all damage is multiplied by .25) and you have +5 armor. As the British emplacements have 5 armor, this +5 armor makes them very resistant to small arms in brace as well as making flamers do less damage (all flames have a pen of 2.5 for active flames and 1 for passive flames).
Buuuuuut all emplacements seem to have a received damage modifier on them (of 2) that just makes them take times two damage, now I can't tell if Brace turns this off or just helps negate it with a modifier. Regardless here's the math.
Mortar Pit: 700 health normally with times two damage has 350 health with Brace on assuming the times two modifier is not disabled it has 1400 health
Bofors: 1000 health normally with times two damage has 500 health with Brace on assuming the times two modifier is not disabled it has 2000 health
17 Pounder Pit: 900 health normally with the times two damage has 450 health with Brace on assuming the times two modifier is not disabled it has 1800 health.
Now Brace itself has a 30 second duration with a 45 second cooldown that ticks down while it's braced meaning it effective has only a 15 second cooldown. This creates a fairly interesting issue were high DPS artillery like mortars and ISG's are actually much, much more effective versus emplacements than actual static hard hitting things or abilities since every single emplacement can just tank the damage with Brace then repair in the time it takes for the ability the enemy used to recharge.
So if you want to counter emplacements rely on things that shoot fast, if you try and hope LeFH's and Stuka Zu Fuss or Sturmtiger will save the day you are in for an ugly surprise. Also comically enough the very large nerf to the Sturmtigers AoE damage modifiers and reduction in blast radius has made it so if an emplacement is more than 6 meters away from the blast zone with brace on it will only take 16 damage lol.