You're supposed to test a set before posting it here...
So you have a Pokemon that can set up Spikes against choiced Pokemon but you no longer have a physical wall, you have a set-up bait instead. Every set-up sweeper can use you as fodder and then threaten your team. Excadrill is obviously the worst because they usually run rapid spin too.
Imo this set replaces Skarm's best quality (checking physical attackers) with something that isn't nearly as good. Let's see what QC says but next time please test it before posting.