In a rule-book tweak that seems to echo one made by the Daytime Emmys several years ago, the prime-time awards show hopes to veer away from rounding up the "usual suspects" by having a blue-ribbon panel determine the nominees after reviewing tapes from the top 10 to 15 vote-getters. The change, approved last week by the Academy of Television Arts & Sciences' board of governors, "brings a new eclecticism" to the nomination process, says the awards' director, trotting out the 50-cent words.