Float is absolutely necessary for efficient snow removal work with a FEL.
I use it on 99% of passes.
Every snow plow ever made (almost) uses float to follow the contour of the ground,
and you need it as well with your loader, along with the right bucket edge angle, like steve mentioned above, you can dial that in by feel while your moving along with the bucket floating across the surface .
There is a short but painful learning curve with using a FEL for snow removal,
The sooner you get the float feature down, the quicker you will be moving snow with little stress.
It took me a couple of hours, before I realised how necessary it was to use float the first time I used my loader for snow. And I had been plowing snow with trucks for 25 years.
Good Luck,
JB