Although I am not one of the people affected by this recent development, I really feel for those that will be. Particularly those who purchased 'access' to the game because it did offer an offline mode, due to circumstances of remote location, military deployment or whatever.
However, to any Australians who are affected by this, all is not lost. Under Australian Competition and Consumer Laws, 'mis-leading' consumers is something that is taken quite seriously, and no amount of EULA or other 'agreement' can reduce or remove your rights. You simply cannot 'contract away' your rights. Period.
Can I suggest lodging a formal complaint with the ACCC, an independent, self-propelled, government backed, law body that aggressively pursues companies who operate in the consumer domain that misleads or mis-informs consumers as to products they consume. Although this may not apply to the original Kickstarter campaign, as it is similar to gambling, it would cover the beta product we have all been playing up until now.
Their website :
https://www.accc.gov.au/
IF anyone is familiar with this body, you will know they are similar to a rabid attack dog, that once out of the cage, is near impossible to put back in until they have had their feed. The fines are HUGE for non-compliant companies acting in contradiction to Consumer Law in Australia. EA games was famously screwed quite royally by the ACCC, and adjusted their performance in the Australian market following legal action brought against them.
Its wont be a great outcome for any and all, but for the consumer, its a 'fire-and-forget' model, wherein the ACCC does all the legwork following complaints, and the consumer usually just moves on after filing complaint, only to hear about the outcomes some time down the track.
At the very least it might encourage to FD to re-adjust their product model, and re-invest in the 'offline-mode' in order to avoid fines and headaches that this process will undoubtedly produce if successful.
As I said, I wont personally be affected by this removal of the offline mode, but I think there is a reasonable case to answer between FD and its offline consumers.