In my opinion, it's not a new acquisition issue.
Facing the "pilot shortage" (?), probably they are realizing that ERJs aren't so different from 320s and 737s to operate, and its pilots have similar experience, then they could consider Embraer pilots.
They (EJets) are not as heavy, but are even longer than the Airbus 319 and 737-700 and have almost the same length as the A320. (38.7 m).
They have newer avionics, fly similar routes (yes, with less endurance), use the same infrastructure, etc.
In my point of view, these Embraer Jets are "regional" only in the name.
*My opinion*