Though I'm nervous about certain front end parts being drilled, there are other means that are arguably just as concerning. I have the aluminum sleeves as well, but at least they are billet and quite beefy. Yes they do save a pound or less on each side.

BondoBob makes great hollow chrome-moly center links that probably save more in weight and are stronger.
The LCA's is a drawback as far as Drag activity is concerned, though as you said, those plates don't add up to much at all and they are indeed for cornering with rigidness.
I do wish that someone could fab STOCK looking types out of Titanium or billet aluminum. As you well know, the Vipers and Zo6's have aluminum struts and A-arms up front and out back.

In the end, these kind of creatures need multi-point check ups prior to seasonal use or pre-race prep rituals.