Well, let's look at the positives first
1. It's bolt on, as per the originals, so they didn't miss the point (like Gibson did in their "reissues" making it set neck)
2. Although I can't see what bridge is on there, they haven't used a three pointer, again would have missed the point (insert point banging on about the Grabber II)
3. The headstock shape is right, even Gibson couldn't manage that in their "reissues"
4. The truss rod cover is a dead ringer for the original
5. Most of the originals had full size tuners, although the shafts of these ones stick out a bit further, this is technically correct (see picture below)
6. Clear coating the headstock instead of trad black is (mostly) correct - most Grabbers had a plain headstock, but Gibson being Gibson at the time, I'm sure some Grabbers snuck out with black headstocks.
7. Bridge cover! Useless for palm muting, but a nice touch and again, technically correct.
Unknowns
Is it string thru body as per the originals?
Negatives
1. Fixed pickup - WTF thought that would be a vote winner? Omitting the USP of the bass you are reissuing/paying homage to seems ridiculous to me. I see there's a mini toggle there, either a coil split or perhaps series/parallel. Yes, that probably does more tonally than the sliding pickup ever did, but that's by the by.
2. Pickguard shape/positioning - yeah, it's a bit off at the bottom, should follow the curve of the body's edge more closely.
3. Pickup choice - from the mounting screw layout, looks like some kind of MM humbucker with covered poles to me. If so, point missed here, as the Grabber pickup (even though it looked chonky enough to be a humbucker) was actually a single coil.