i had been using the motive bleeder for years and i recently switched to this one last year. This unit is 10x better than motive bleeder.
You can also bleed the system up to 50PSI.
Not sure about the forscan never used it. But the 200 is made by autel. I am sure you can do advance stuff with the forscan but 90% of people don't need it.
Yeah better than the dealer . They will most likely won't warranty it because is aftermarket springs even it is frpp and you installed it. Plus you don't want the techs messing around with your car. Something will get damaged/scratched.
You can go to Walmart and buy the tool in the link I posted and check for code and reset your height sensor. It will give you 1 free manufacturer to choose so you will be able to diagnose your car completely with bunch of extras. Non of that generic code crap. It is a very good tool.
You can...
This how mine is with the car on the ground. Picture was taken from behind the exhaust on driver side.
Check if the harness on the rear shocks did not get pinched on the 18mm shock mount bolt. I managed to do that once and had to fix my wires.