If Valve is planning to continue with this new ammo mechanic, they should give us the ability to buy extra ammo at spawn buy menu. Or let us refill ammo by going back to spawn and purchasing more.
This change might make it a bit more CT-sided, considering the gun which suffered the most from this change is the M4A1-S, it might balance things out. T-side gameplay requires less spraying anyways.
This way, people wont be spamming Reload because now it actually costs money and time. Which is what Valve is trying to implement, as said in the patch notes. But less people will have to get stuck with no ammo in clutch situations.