Dn't think the route map is particularly helpful as it simply shows today's network.
As for LCY, common sense dictates that it is not very likely that it will remain as an Aer Arann route. I guess Aer Arann is trying to squeeze out some sort of subsidies / fee reductions from IOM/LCY to keep the route and transfer it to the EI franchise as well. If this does not work, I guess it will be axed. As for the route being bookable - I have booked quite a few flights on various airlines only to be informed later that, sorry for the inconvenience this may cause, but the route has to be axed.
London City air link in doubt? - Isle of Man News - iomtoday