Improved range and better tracking (I'd prefer auto tracking vehicles reticle red vs swarm-style locking) would go a long way in vehicle combat.

I get that Rails win at distance. I'm OK with blasters shredding my tank up close. But blasters absolutely shred at midrange too.
Midrange combat goes:

-Blaster tank starts unloading, knows its aim is good because rapid ROF gives instant feedback on hit/miss by monitoring enemy health readout. Stops aiming when damage is done, adjusts when no damage being done.
-Missile tank aims carefully to avoid wasting barrage thus losing time, or rapidly aims and significantly reduces hit chance. Fires and probably misses - maybe one missile hits.
-Blaster tank continues firing and approaches, improving accuracy.
-Missile tank carefully readjusts after each barrage to ensure hit but wasting time or fires wildly and more likely misses. After a missed barrage or two the battle is decided and the missile tank explodes.

Blaster wins vs infantry, vs lavs (which missiles have no hope of hitting) and vs tanks at close AND mid-long range.

At mid range, where it may be difficult to get a perfect sight on your enemy, I believe positive feedback from watching enemy health or shield glow is vital. Aim towards your enemy until you see their health drop or their shield flash - then you know your aim is good. This doesn't work with burst / barrage weapons like missiles.

Missile speed is pretty good in this build - what they need is some other way of improving accuracy. Tracking vs vehicles and a functional splash vs infantry.

My biggest thing is what is going on with the tiny explosion radius from a missile? Its so small people often simply jump out of the AOE. Missiles should be great anti infantry weapons.