They should just be infantry support. At least if they did that for a change instead of all going one man army they wouldn't complain about being killed by the few people who put points into forge guns or swarms.

No you don't support slaying.
You support troop movement, battle lines, logisitcs efforts that kind of thing.
No logi vehicles / modules anymore.
Logistics: the detailed coordination of a complex operation involving many people (troops), facilities (Scanners/Cannon), or supplies(mcru). You're thinking of the old triage modules.

You provide a spearhead in an Assault.
Which is negated by getting hit by AV once or twice, infantry aint gonna pay.
Once or twice are driving a glass cannon fit all the time? Secondly that is the job of a spearhead, breach the defenses and retreat so the cannon fodder can now pile through the gaping hole in the defence.

You provide mobile cover for staggered movement across flat open terrain
Same as above.
retreating is not a problem, by the time you need to retreat, the enemy team will have be at a lower force strength making advancement easier.

You provide suppression against enemy infantry
Unless you are using rail, that suppressions is negated by accuracy.
If your attempting to suppress people with a Large Railgun, you might be beyond help, Rails occupy a different role

You provide LOS Artillery support
What?
You use a railgun at long range to bombard high value targets that are close to the battle lines

You provide Troop Transport (in extreme circumstances)
Useless if you don't know where your bluberries wanna go.
If they are that blue, just drop them near the frontline, they'll get out when they smell blood, otherwise continue on your way and they will jump out when necessary

You provide Anti-Vehicle duties (LAV's, DS, HAV's)
If vehicles are for infantry support, there is no need for this.
So removing the enemies support is pointless? Cutting them of from everything above is useless?

You provide distraction and diversion
Aye, but blueberries can't make use of that.
They make much more use of it then you will probably ever realise.

This game is not about 'slaying' and as we reach a more nirvana state of balance this will become more apparent.

We already have Scouts and Point-man Assaults, who relay the defensive structure of the enemies NULL Cannons.
We already have Sentinels who let no man reach his line.
We already have Logistics who maintain the front line.
We already have Assaults who push that line forward.

Slaying is not a role in this game, you can play a match and only loose 12 clones, but still loose, I've seen it happen.
Slaying is simply an action that must be performed by certain classes in order to fulfill their primary role.

HAV's which are categorised as 'Close Infantry Ground Support' do not need to slay on a regular basis, however it is a nice reward of 50WP when you do.

Seriously, nobody is gonna use expensive vehicles for stuff that awards no WP, I'd love to give you WP for doing all that stuff.

especially when nobody wants you there if you are trying to be helpful in creative ways instead of just murdering reds and defending/pushing objectives.
define creative, that makes it sound like your just blocking the entrance on Line Harvest or shooting redline installations on Manus Peak, if you are actually helpful, we will be grateful.

'Close Infantry Ground Support' does not necessarily mean not killing things, That's what I'm saying, because it also doesn't mean you HAVE to kill things.

it can mean that the enemy has to adjust to the HAV and that means infantry can easily kill the AV players, which doesn't happen, blues rather get some popcorn and watch the blue HAV get destroyed than killing those AV players.
You need better blues (matchmaking) I have played with some exquisite team players, always prioritise the AV when Assaulting a posistion and never complain when they need to pull out.

Your opinion is biased because of your poor experience, I've seen scores of blues suddenly carve through a stacked squad because they had to scuttle after a tank rammed himself into their little hidey hole.

You have no sympathy for us, why should we have any sympathy for you?
I have empathy, I understand some of the challenges you face after all I'm an ADS pilot. But I've helped my team win more matches by suppressing the Enemy logisitcs efforts than I ever could mudering reds on the front line.