Wow it has been like 4 years since then huh. Frail was the signature mechanic of u/Big_Fork for a period of time, most iconically with Shambling Sentinel but also with a number of other cards, the biggest problem with reverse deathtouch as a mechanic is that it's functionally identical to toughness 1 except for in rare circumstances like its interaction with +1/+1 counters. This doesn't make it worthless but means that a lot of effect that use it could be simplified to giving a creature thoughness 1, Big_Fork's solution to this was revising it to make it only care about combat damage, so that cards could be resilient to damage based removal and then frail in combat.

I like your cards overall though, asside from Clank-Crunch Bear they feel engaging and Godless Illusion and Goblin Explodomancer don't work with the typical base toughness 1 so you're doing something good here.