I like playing as the Brit Arty, but i feel like Mr. Prince is too valuable to use as a sniper, too weak to use as an infiltration and sabotage unit, and too stationary and limited to use as a spotting tool.
That, and it could be interesting to have the brit spotting vehicles be separate. Rather than one upgrading into the other, (replaced really), it could be instead that both vehicles are accessible at once.
If stealth is needed, take the bren carrier. If increased bombardment, take the sexton carrier, and if map coverage is needed, take both and put them on either edge of the map.
Finally, I think it could be asked that Counter Battery be a non-timed ability. The player would designate their desired battery as a CB battery and it wound function as such until it engages an enemy artillery unit, rather than stopping the function after X amount of seconds.
The OKW gets mostly off map strikes and rocket based strikes, that’s their schtick.
The Yanks get anywhere coverage with their peculiar method of doing artillery, at a high ammo cost.
The Russians get one spotting vehicle as is expected
and so I think the idea of having multiple spotting vehicles for the British could give that faction an interesting playstyle.