#1
Short and sweet, whenever I do warm ups lately, I've been noticing that my index finger seems to be inaccurate. The other fingers are fine, but it always seems to miss the in the accuracy exercises. This matches up with where I seem to flub notes when playing full-speed.

Any exercises I can do specifically to improve first finger accuracy?
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#2
There's the old principal of working on the specific thing that's causing problems.... Maybe try large-interval skips using the index finger alone?

For most, the index is the "anchor"... When planted guides everything else. At least that's the case for me.