Unexpected behaviour from [line] object in Max 8

Hey guys,
I get some weird behavior from the [line] object. I have used this little snippet to make values from midi controllers become less jerky and stuttery in earlier releases of Max, but it only seems to make matters worse now. As you can see in the patch example, it has some "legacy behaviour" that can be accessed with the @compatmode 1 attribute, which seems to fix the issue, and make it behave as I'm used to (phew, thanks).

What is the difference between the new version of the object and the Max 7. and earlier version, and what's the purpose with these changes? The current way it produces stuttery values when receiving a stream of prompts doesn't make much sense to me.