1.11 is a godsend if you make attachments, especially stuff that relies on symmetry, like shoes and complex avatar bits. Avatar reference mode as been replaced with Attachment. This means that when you drag something along a certain plane, other planes are not influenced. Today's project could have been done easily without this (a jetpack that only has to be centered on the X plane), but it's nice to know when I make shoes or symmetrical body parts, positioning won't be eating up any of my time.
LL is getting so much flack over this upgrade that I thought it deserves mentioning.
go LL!