Even after the point reduction they are still quite a lot of points. Also with the new deployment rules, and their size, and the squad having to deploy still 9” from enemy they are not as good. They take up a lot of space, which a wise opponent won’t let you have.
However they are good for getting your troops in the enemy’s face, reducing deployments and sitting on objectives once down. Also they reduce your susceptiblity to alpha strike and can always be used to reinforce your battle line to react to your opponents moves. Though this is reactive rather than proactive and should be avoid unless necessary
Painting wise on the rhino, only a little one, I like to do the ammo in hoppers in brass to contrast with the gun. Also the lights can simply be painted dark yellow then given a wash and grill picked out in metal to contrast them. Lastly I’d paint the lens on missile, coupla and bits in at least red to detail them. Easy to do but makes a bit difference.