the tommies' flare throw range need to be increased to 30 meters. 20 meter is way too short for an artillery.
and remove the physical flare itself. The base 25pdrs are the british counterpart to the panzerwerfer and the katyusha, and neither of those artillery have flare to warn the enemy.
Indestructable, spammable non doc arty that requires nothing but a small muni investment to be shot and gets strongr later in the game (for free!). Buff it and it becomes retardedly overpowered.
the panzerwerfer and the katyusha are worth 360 mp 85 fuel. Converted to mp it's ~800 mp.
A munition cache will increase munition income by 5 mu. Assuming the british take that 800 mp and use it to build munition, it will increase munition income by 20 mp per minute.
The tommies artillery are 45 mu for each call. This mean that it will take two minutes for the 4 munition cache to provide the tommies with the extra munition for the artillery.
the way I see it. the british (and American) don't get rocket artillery, but they get the tommy and major artillery instead. Instead of needing to buy something like a panzerwerfer, the US and UKF build cache to maintain the munition needed to use the artillery.
theoretically anyway, the major and tommies artillery are so useless that no one uses them.