I've got an 2018 800 U Force and didn't like the spacer system under the spring for 2in lift, so I unbolted bottom of front shocks and installed plates to lift the shock 2in. Did the same with the back shocks, just from the top. This way the shock suspension stays the same. Is there any negatives to me lifting it this way?

Nope. That is the superior way to lift tmwhen keeping the stock suspension.