Any changes for MY 2019? How about colors?

QS was available on the 2017. I havent heard any news about the 2019 but I would love to see the SP get released in the states.

So what is the reasoning behind Yamaha not releasing a SP model in the States, does anyone know?

I was seriously looking at trading in my standard 2017 MT10  for the 2017 SP. (for some reason the USA also dates their bike a year ahead)

The run out model on the 2017 SP is the same price as the standard 2018 MT10 which has just been released here in Australia, there is definitely no difference between 2017 & 2018 SP or standard models.

Most bikes for the following year are introduced at the AIMExpo which is held in mid-October, this year in Las Vegas. Sometimes information on carryover models is released beforehand, but not always. I wouldn't look for the color palette for the 2019 MY to be known for a few months. Sometimes a model will be released early (the 2017 FZ-10 in the USA was one), but usually the new ones go on sale at the dealers around November.

TPMS for bikes is something you don't really see in the US, if it's on Euro bikes it is a nanny state thing. Whether or not it would come to the US would be on a case by case basis as to whether it is cheap enough to introduce. I doubt you'll see it unless it becomes mandatory, like rear view cameras on cars.  Chipped key bikes are the norm in Europe but they are not on US bound bikes. Part of this is the cost issue, part is the public doesn't want them. Bikes are thought out very carefully to hit a specific price target and market, if they can save $5 by not including a helmet lock, or $20 by omitting a centerstand, and if they believe the public won't care the item gets left off. I doubt most riders are in much of a lather for TPMS. It would be nice to glance down and see what the pressure is in the tires but if you pick up a nail you are still going to get stranded on the side of the road.  A repair kit and a way to put wind in the tire (compressor or CO2 cartridges) is a must have on any bike, it's the first thing that gets packed in my tank bag.  Right now I have both.  The last two nails I picked up were discovered in the garage, but the plug kit still came in handy.

The reason the SP model has not been introduced in the US is that Yamaha USA doesn't believe there is sufficient market for this kind of bike. It's expensive to bring a new model to the market. The -10's haven't exactly been flying out the door, they are an expensive machine and many guys can't quite stretch the budget (and insurance) to get one, adding a few more thousand dollars for an SP model really restricts the target audience. Motorcycle sales are in a tailspin in the US, many older riders are aging out and younger people aren't taking up the sport. Whether it is H-D, or the various Euro bikes and Japanese machines, there is too much supply and not enough customers. Everyone is trying to turn this around but it takes time. You may or may not see the SP in the US, personally I doubt we will with the state of the business.

 Yeah that's what baffles me as well narcissus, 

We live in a country virtually the size of the USA but with a population less than Texas.
Australia pays far more for cars compared to the US, but motorcycles prices are on par.

There are very few MT10's being used over here as track bikes, with the flat bars they simply do not perform as well as a sports bike like an R1 or R6 on track, my track times on an R6 are faster than the MT10. 
The MT10 is designed for the road riding, I personally wouldn't use half the electronics supplied with the SP model but that superior suspension set up IMO is well worth the extra money. 

Who else has TPMS on any vehicle they own? I've had nothing but problems with it on any car I've used. Seems to be common issue. On my current car, my remote start won't work when my TPMS faults. I don't know if I'd want it on a bike and the RPMs we put on the tires.

I could be the exception though. Maybe others it works fine.