It would only be good for leveling towns and bases...vs tanks it will lose...good luck dropping a 155 HE on my moving Panzer a mile away while I hit you with 75mm AP. 
Don't forget...we don't have infantry to decimate with artillery.
Since when has levelling a base been not worthwhile? What about counterbattery fire against those trying to level your base? This is yet another dimension of the arms race. What about infantry that behaves something like either autonomously or under the direction of a player?
Many artillery weapons have good direct fire capabilities. Consider, for example, the SU-152. Care to take that on with your PunyPunkPanzer? I attach a little account below. The SU152 will leave you mit ein pupenschute fertig!
The SU-152 was produced throughout 1943. The 152 mm gun was a highly effective antitank weapon. It fired a very large shell, making it useful against infantry as well. It provided long-range fire support for tanks, particularly against German heavy tanks and strongpoints. The principal disadvantages of the vehicle were a low rate of fire due to the heavy ammunition, low ammunition storage (only 20 rounds) and a cramped and un-ergonomic crew compartment. Its armor protection was adequate.
The SU-152 was issued to new heavy mechanized gun regiments, raised in May 1943. The first regiment arrived at Kursk with only twelve guns, and was brought up to its full strength of twenty-one guns during the fighting (Zaloga 1984:165).
In defensive manoeuvre SU-152s were utilized by Soviet forces as powerful anti-tank weapons. Usually SU-152s were used to ambush German tanks. Another common tactic was to amass SU-152 fire (very often direct, sometimes indirect) against the enemy. The power of the SU-152's large high-explosive shells allowed it to damage enemy armoured vehicles even without armour penetration. The 152.4 mm BR-540 armour-piercing round, with a total mass of 48.8 kilograms, devastated enemy vehicles. With a muzzle velocity of 600 meters per second, it was able to penetrate 100 mm of armour at a distance of 2000 meters. At closer ranges the kinetic and explosive energy of the shell could rip the turret off a tank. As a result, it was claimed that SU-152s managed to destroy at least seven German Elefant tank destroyers, which were unstoppable with any other antitank weapon. German after-action reports claim the loss of just one Elefant to an SU-152. Numerous German AFVs were claimed as destroyed or damaged by SU-152 fire; for example, Major Sankovskiy destroyed 10 German tanks in a single day with his crew and his SU-152. He was awarded the title of Hero of the Soviet UnionHero of the Soviet Union
