I see no reason to "hack away". You are very well "dialed in" with an excellent list of gear...great job. As a hammock camper myself, my gear list is extremely similar, including the same hammock, underquilt, and windjacket. Your weight is under 13 lb. Yes, you could shave a few ounces but IMO you are at the point where it no longer matters from a comfort standpoint.
A few comments I would make...
1. I would not ditch the Montane wind jacket; even though it is slightly redundant with the DriDuck jacket, if you own one like we do, you know how darn comfortable it is. It is one of the "luxury" items I justify by bringing down my packweight in other areas.
2. I would switch out the Leatherman tool for something smaller and lighter.
3. You could really make a difference by changing to an ultralight pack such as the GG Murmur or one of the Zpack Blast packs. The Murmur, though not extremely rugged, is durable and large enough to handle you gear if handled properly, and is not very expensive.
4. I just ordered whoopie slings for my Traveller. I will not save any weight but I find it so much easier to undo with the toggle vs. the slip knot technique recommended with the standard Traveller setup.