I wouldn't call it an issue. As long as your dealer sets it up properly it works as it should.
If you're thinking you are going to spin tires and power up hills at speed, this isn't the machine for you. But if you want a reliable workhorse that will haul a load up a hill at 9 to 10 MPH it won't let you down.
Like I joke with my friends, your side by sides may be faster, but lets hook them back to back with a chain and then see what your 150 h.p turbo 1000 can do, because my 2500 pounds will drag you all over the yard, LOL
The wife and I actually enjoy trail riding with the RTV. Where my Polaris has to rev to get up the hills the RTV will literally just idle along, nice and quiet. And it will climb in 2WD where my Polaris's won't climb in 2WD. They would just spin the tires.