Whether you think this a worthwhile idea, or not, it "is what it is, and a new rule to follow. Since the whole "spiking" idea became a reality, smart officials have been seeking, and usually getting, an indication from the QB that the intent was to spike, so they could be better prepared and on guard to reduce the "unexpected".
Same common sense applies, maybe even more important with this revision. Reminding the QB what he needs to do, and a little bit of what should NOT be done, is still a good idea and falls under the blanket of "Preventive Officiating". The OBJECTIVE remains to IMMEDIATELY stop further action, which allows the game clock to continue running, it's NOT to be creative and/or deceitful nor allow anyone to gain some foolish UNEARNED Advantage.
IMMEDIATELY is still a critical element, and is STILL determined EXCLUSIVELY by the field game officials.