EIP-7782 proposes reducing block time from 12 seconds to 6 seconds by shortening block proposal time from 4 seconds to 3 seconds, and reducing both attestation and aggregation times from 4 seconds to 1.5 seconds.

Quotes that support claims

EIP-7782 proposes adjustments to three key subslot timings: block proposal time would go from four seconds to three, attestation time would fall from four seconds to 1.5 seconds, and aggregation time would drop from four seconds to 1.5 seconds, shaving six seconds overall.

Under this upgrade, the block proposal subslot timing will be decreased by 1 second, the attestation proposal subslot will decrease from 4 seconds to 1.5 seconds, and the aggregation proposal subslot duration will decrease from 4 seconds to 1.5 seconds, combining to a total deduction of 6 seconds off the current 12-second cycle.