They increased the range of the Xeno Scanner because now the little blighters are instantly hostile the range was difficult to get the scans with so the enhanced increased the range to 2000m. But the range on the Composition scanner is 1000m plus they don't stay still like they used to to get the scan, plus the information the Xeno Scanner gives you is the same information that the Composition scanner gives you i.e. the Thargoid variant, all be it that the Xeno scanner gives you target information for hearts etc. for the larger Thargoids.
Since they have specifically given us the Enhanced scanner to help scan the blighters from more of a distance because of their new hostile nature plus the info to the Composition scanner is the same or more enhanced you'd think that either the Enhanced scanner would update the Codex since the info is the same or they'd also increase the range of the Composition scanner for the same reasons they enhanced the Xeno scanner, like I said if you think your piloting skills are up to it and you want to go toe-to-toe with a Hydra @ 1000m without being able to shoot back to update the Codex and you think you're hull can withstand the onslaught, best of luck - you're gonna need it!
BTW you're metal detector would at least highlight the metal screws/nails holding your plastic pipes in place so you could at least know roughly where they are
