people join, people leave. Do your training. For 99% of us the politics means absolutely nothing. The mats are still there, your sensei is still there. Whoever is at the top of honbu is many thousands of miles away, and doesn't know anything about you and your training - so don't worry about him, do your training.
Chida Sensei teaches Gozo Shioda's aikido whatever the name of his group.
Neville didn't mention that Saburo Takashima Sensei is part of Chida Sensei's group so the Malta group seems to have joined Renshinkai.