If the industry was wise they'd do just that but make it more affordable because they need all they can to keep the industry alive in America.
It simply doesn't work that way, more options = more cost.
To offer an upgraded suspension + brake package they cant just slap on parts and ship it to dealers anymore. The mere threat of product liability litigation makes it so they must take measures to CTA (cover their a$$) by investing in product development for each model version they sell, in addition to paying for product liability insurance to cover their whole production volume. A sad reality of our current market economy
Additionally, to support more options they must develop corresponding service procedures to remit to dealers, train techs to perform different procedures sometimes, and keep those consumable parts available for dealers to order. All small costs, but incrementally they add up to big bucks if this were implemented across a 10-15 bike product line. Once they do that for 5-10 years its a lot of parts and procedures to document and source.... and someone has to be paid to manage all of it. And models change quicker than that, so its multiple variants of multiple models over multiple years..........
So to do this AND make enough money to stay in business they would HAVE to charge more money for extra OEM options.
BMW used to do what you wish existed still.... but they couldnt sustain it/the consumers did not buy enough to support it. Im thinking of the late 2000s G650 x-country, x-moto, x-enduro? (there were a bunch of same model variants cant remember them all). They have identified a specific niche that it still works with, the "A" versions of the GS line sell well so its worth it, but only for 800 & 1200s, not the cheaper bikes. Although they kinda still do this with the F700, it has the exact same engine as the F800, but de-tuned and with different styling and with cheaper components elsewhere to knock the price down and appeal to different consumers. But that was a deliberate and calculated move, and it is still not a cheap bike.
In the view of manufacturers, keeping motorcycling alive in the USA means attracting new riders who aren't currently riding, the baby boomers with deep pockets are aging out of the sport quickly, and they need to offer cheap and approachable bikes to appeal to new riders, with a product line that a rider can upgrade through as they advance in skill and experience.
So the options you desire are generally taken care of by the aftermarket scene, cheap bikes have cheap owners (as they see it) so smaller models do not receive the support larger more expensive ones do...
Aftermarket mods also take the liability out of the hands of the OEM, and let the few who do want/need these features take care of it themselves... pretty ideal situation for the OEMs, so this isn't going to change anytime soon
If this thing came in a 400cc version that could maintain a true 60 mph at a reasonable cost I would probably get one. 
