no. it is acceptable. nowhere near ideal. Ideal would be a wishbone 3-link or triangulated 4-link, with a parallel 4-link with panhard/track slightly below those.
it is possible we are getting a parallel 4-link here with a panhard/track, I have not seen evidence against it, other than the...
for my reference to the modern SFA 250s, and similiar to our TTB trucks as well, are the radius arms, while these behave much like a 3-link, technically they aren't 3-link suspensions because the raius arms mount at two points on the axle (above and below). these are more akin to ladder bar...
I'll add, on SFA with the panhard/track, you HAVE to lower the panhard bar the same amount that you lower the steering cross over. otherwise you get very bad bump steer. On my 250 there is about a 2" different in height over a 10" drop, so very slight, but evident, and that bump steer is...
here is a decent article.
note that that top picture is a horribly setup design.
http://www.trucktrend.com/how-to/chassis-suspension/0804st-rear-suspension-design/
at least for offroad applications, or any application capable of putting down some power, but it looks to be on a chevy, so it...
that is called the panhard or track bar. it is what provides the side to side location of the axle. there are two trailing arms that provide front to back, and of course the coil springs the up to down location. leaf springs didn't need one, they can provide location in all three...
What about the bar intrigues you? Maybe I can shed some light.
As for the pumpkin, I think someone has already pointed out that it is an upgrade over the Jeep Rubicon axle.
I went by mine to inquire on the Mach 1 allocations and Bronco.
On the Mach 1. 'What's that? let's look it up....oh look at this...here's all the stuff it has...(yeah, man I know everything it is getting)....well, we should get a couple...'
On the Bronco: Uh, yeah I think it gets revealed...
Yeah, was discussed when the vid came out. It looks to be an auto front dig. Appears to be a button for the function on the dash for certain off road packages.
pretty nifty, beats having to twin stick and double parking brake a truck
I've had my F-250 break down out of the blue in the Ford parking lot when I went to look at mustangs. She just didn't understand I wasn't replacing her, but looking for a stablemate.
I'll watch the youtube/ford.com reveal, then the commercials afterwards. Im sure the commercials are going to be simple marketing fluff pieces, like the commercial from yesterday. whereas the youtube/ford.com will more revealing/technical.