Now that clips envelopes converts in to arrange envelopes while placing a clip on the arrangement window, dragging a clip's boundary extends the clip, but not the envelopes.
As you may have seen on my videos, I use to work a lot with rhythmic envelopes, many unlinked and with odd lengths like 3/16 17/16, etc. this adds a lot of dynamic on your productions.
Now if I want to extend a clip that has this kind of envelopes, the only way I have to do it is by using the Arrangement Record Button then wait for the whole time, or copy paste by hand envelopes one by one.
It must be some way to mimic Live 8 workflow for unlinked odd length envelopes.