OCSP isn't an optional step involved only if you don't present your CA's intermediary certificate, it's in addition to it. The whole point of it is "I have this

OCSP isn't an optional step involved only if you don't present your CA's intermediary certificate, it's in addition to it. The whole point of it is "I have this guy with these legit looking credentials you issued, do you still stand by them?". You can't work around that with chaining, it can only be disabled from client code, or by having the CA issue a cert that doesn't include an OCSP address (doubt any do this now, given the number of legit certs issued to attackers in the past 2 years).