I have never had an I pilot. I do have an xi5. By no means am I trying to talk you into keeping it. But, I'm happy with the unit. I crappie fish, so holding over a brush pile is important to me.
Maybe these things will help. It took me a while to get the hang of it. Obviously you know how to spot lock. When I want to take it off of spot lock, I hit the spot lock button again. That takes it automatically into manual mode. You can adjust your speed again from there. To turn off the manual mode, hit the button that looks like a propeller.
When you first start up the unit, hit the propeller button to take it into manual mode. For example, I am usually on manual mode while looking at my front graph to position over a brush pile. When I see it on the graph, I hit the anchor button. After I let it settle down for about thirty seconds, I usually need to hit the button to jog forward five feet. (For some reason, mine usually locks about five feet behind where I lock it in.).
Hope this helps. If not, enjoy that Minn Kota you will get. Here is picture of the remote so that you can see the buttons.