I’m not so sure. If they’re going to more artillery and getting more mobile, I am not sure that’s a bad thing. What would be a better thing would be if the Army makes up their mind about the new light, airdroppable tank/tank destroyer and the Marines could get some. The current Abrams M1A2C and upcoming M1A2D are 74 going on 75 ton beasts that aren’t that easily transportable. Even the giant new LCAC-100 class landing craft can carry only one M1A2C to the beach per run - no supplies or anything else, just the one tank. But it could carry three light tanks (assuming the M8 Scorpion with level III armor as an example).
The long range rocket arty has probably changed the need for tanks.