Not an Embraer specialist, but, from what I'm told, E195s can't do LCY, (some?) E190s can. So, if they're serious about LCY, it makes sense to have them. These are the first E190s in LOT's fleet.
IEG is paid for by the provincial administration, so even an empty Q400 flying from Warsaw to "Zielona Góra" (in quotes, because it's seriously far away from the actual ZG) is a plus for LOT (and a minus for the taxpayers, but nobody seems to care). Not sure about how LUZ works.
I do hope their monumental expansion redeems itself
I'm expecting a massive flop sooner or later.