For the foreseeable future NAL is the only project of relevance...

For the foreseeable future NAL is the only project of relevance for both PLL and SYA and would be better off merging IMO, combine their cash and have a single entity with 100% ownership of NAL, two OTA's , no debt plus other assets that are years away from any meaningfull contribution anyway if developed or mothballed or sold.
That simplifies decision making, cuts out a layer of management and either buys a little more time for things to turn or go into C&M with more cash on hand and better position to restart.

There is no perfect solution its more a matter of making the best out of the only asset of any relevance , both companies are dependent on NAL and it makes little sense to remain a complicated and divided arrangement . It doesn't change the immediate outlook but does give options.

Cheers Whisky