and where's the prob?
The problem is that without the mortar pit Brit indirect fire does not arrive until the land mattress. This means that cheese strats, like support weapon only plays would be possible.
Oh you mean like the PAK43 and every other factions emplacements? Seems fair to me... Boost their HP 25% if you have to, but brace needs to go.
The Pak 43 is very niche, and to be fair the 17 pdr is also rare, both suffer from something similar, having a giant AT gun that can't move is always going to become a target for every indirect fire weapon on the map. Now the 17 pdr also costs a fair chunk of fuel so it needs to be better than the pak 43 in someway, although I would be happier if it didn't exist at all.
The only other emplacements I can think of are MG nests and Howies (RIP 20mm flak), both of which are common in the right matchups. While I completely agree that brace requires no skill, it is supposed to be a retreat button for a unit that can't move, and in this way it is trying to be COH. I don't think the brace button is sufficiently COH-like, this should have been a warning to the designer of the unit, and I don't think emplacement play should ever exist because it's lazy.
Brace should be addressed and maybe part of that is reducing flame damage against emplacements but removing brace and maybe forcing some emplacements to be garrisoned to be useful. Don't know, that is something that I need more time to think about.