I think the overall logos are 4/5. The only things that are dragging it down are:
The fact BBC Two and Four use the same font. I feel like it would be more interesting if the main four channels had different main fonts (but not too different.)
Seeing the BBC Three logo in blue is not as nice as seeing it in pink/similar colours.
The CBBC colour scheme is OK so I like you kept it, but the logo just doesn't work. I would like you to try maybe bringing back CBBC One (as CBBC) and CBBC Two (as cbeebies.) I think it might work out.