So here's my take on the Carrion Crawler that I feel gives it enough of a boost to fulfill its ecological niche, hopefully without making it too much more challenging. Curious to hear what other people think.
Multiattack: The carrion crawler makes either two attacks with its tentacles or one with its bite.
Tentacle: +8 to hit, reach 10 ft, no direct damage but inflicts poison (see below).
Poison: Target must succeed on a DC 13 Consitution saving throw or become poisoned for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the poison on itself if successful. While poisoned, the target is paralyzed and suffers 4 (1d4+2) poison damage at the start of each of its turns. If reduced to 0 hit points while affected by this poison, the target is stable but poisoned for 1 hour with no further saves (same as Giant Centipede poison), even if it regains hit points, and is paralyzed while poisoned in this way.
ncG1vNJzZmivp6x7prrWqKmlnF6kv6h706GpnpmUqHyuu9GeZKudkaG2tMDInGScmaKntrC6jJypmq%2Bcmr9uvM6iqqimXmuDcn%2BTamY%3D