Here's where the scope and feel of the Resistance doesn't match between TFA and TLJ. From what was presented in TFA (and related materials), the TFA is a small group of rebels. They aren't a highly structured military organization. Leia keeps being called by her first name without a title.
Holdo then comes in in TLJ and knows these volunteer rebels are freaked out and does nothing. Unless everything we know about the Resistance changed with TLJ, then these aren't professional, highly trained soldiers/pilots. There's no reason to think Holdo shouldn't tell them something to avoid them freaking out.
Holdo not telling Poe is fine. He's a lose cannon and just got smacked down by Leia. But Holdo not telling Lt Connix implies those on the bridge had no idea what the plan was.