Here's the issue, people are treating everything that's not an AV13/14 battle tank as a cheap transport, and that seems to be how GW looked at it.Personally I think Hull Points balance out vehicles pretty well. Heavier vehicles like Leman Russ's, Land Raiders etc. now feel more beastly as you can no longer stun lock them. Unless you destroy them they will be doing bad things to you next turn rather than idling in one spot while the crew drools on themselves.. Lighter transports feel like actual transports.
The problem is that dirt-cheap transports are are a minority of vehicles, even light ones, there are lots of gun tanks and artillery units, as well as pricier transports, and not all transports were meant to be cheap battle taxi's, many were meant to be support tanks as well.
Heavy tanks were were disabled far more often by penetrating hits than glancing hits typically, most stuff that coule hurt them penetrated them more often than they pen'd them (e.g. meltaguns, railguns, lances, etc).
Everything, including heavy tanks, are easier to kill than they ever have been, by a significant margin, and the very existence of a damage table has been made largely superfluous in terms of vehicle destruction.
It's the first edition where transports weren't deathtraps or assault skateboards. GW never bothered with adding in reasons for infantry to disembark like every other game system has (e.g. spotting, taking defensive positions, clearing/creating obstacles, etc).Something you use to get you where you need to go quickly, and then you get the hell out of it. Crazy I know. In 5th, Transports weren't transports. They were mobile homes that units would sit in all game until forced to disembark.
A pen will stun a tank, people seem to think the only time vehicles got stunned was on a glancing hit, and that somehow with no damage table for glances suddenly tanks never get stunned anymore. Tanks still get stuned on pen's, which against big guns are more prevalent than glances, and against large numbers of glancing hits from weeny weapons your tank is dead instead.Are vehicles more fragile? In terms of being easier to destroy, yes. In terms of sitting impotent all game doing nothing, hell no. I'd much rather have a tank that I can actually use while it's "alive" then one sitting in the back all game, doing nothing after being stunned 5 times. Actually moving and shooting my models is a lot more fun to me. Guess I'm odd that way.
Unless you're just taking glances one at a time and your opponent just quits shooting at it after 1 HP ding, your tanks aren't doing anymore than they were previously, likely less.