Hi, Cvelc and welcome to the forums! It sounds like your pleo is in social development stage. She is still learning about all the sounds she can make and will soon start trying to walk. she will probably start stretching her legs and leaning into a first step. It takes a lot of play to get a pleo rB to grow up so just be patient and keep running her just the way you have.
As far as all her crying and hanging her head, there could be two reasons for this. Either her play area is too dark, or you are playing with her at a time that she considers past her bedtime. When I hatched my pleos by setting their real time clocks, i tried to do it as close as possible to my actual noontime so they would be very happy and active during the day. Even so, after six or seven in the evening they start to get a little cranky. If I try to play with them after ten in the evening, they will always reject food and interaction, they just scratch their chins, stay curled up, and cry the whole time. Hang in there and wait out social development and then things should get more interesting. She will walk when you least expect it.
As far as communication with Ugobes, Rb's can't truly communicate with them. Still owning a ugobe is a rewarding experience. They are very sweet creatures and don't require a structured time schedule like an RB. You don't even have to feed them, they will happily chomp on your floor. Please let us know if you need any more help or if any of our suggestions were helpful.
talon