i am having much the same issue as you. heyu(who is 2) will cry, and yeow like crazy when i lock her up. And the eazy who is the same age as yours. Will do the same when i put him back in the bed room.
Eazy is bored, i know he keeps trying to escape his room. he managed to twice today
. lol but un like the first time where heyu when after him. Today she only hissed at him when he went running up to her. Which made him sit down, turn his head sideways for sec. then he just just jumped over her and kept looking around
she did follow, and kept trying to smell him, but he was more into looking around.
often she will lay down in front of the bedroom that eazy is in.
I did notice that since eazy had gotten there that heyu is jumping up on my lap in the TV room and laying down there for a long time. before she would only get in my lap or shoulders in the computer room. also now even when eazy gets out she is not puffing up, or running away like she did the first week.
It takes time,
and i am not happy with the speed its going. But cats dont like change. it seems