I believe the leadership in Indonesia still think that Indonesia and China dispute over EEZ in South China Sea is still manageable. The position that Indonesia takes so far in relation with US and China rivalry is that we are neutral, although regarding to SCS, Indonesia has made strong stance that it rejects China nine dash claim.
I also believe China will not try to take some Indonesia EEZ in North Natuna Sea as long as Indonesia will keep having good economic growth (economic muscle) and adequate military power. Although I dont buy any of Indonesian members opinion saying Indonesia need to have powerful force as fast as it can (and for that reason huge acquisition of imported weapon need to be taken) because of China immediate threat.
I dont believe China leadership is that fool that make them take aggressive stance to Indonesia like they do to Vietnam/Philippine/Brunei/and Malaysia. I believe instead of taking Indonesia as enemy, China leadership has more thinking to get Indonesia as their friend thus will scrap the idea to claim Indonesia EEZ in north Natuna Sea.
My strategy is that Indonesia need to do power balance in SCS with long term strategic vision, not like 5-15 years period but rather 15-30 years period. I believe for another 20 years US will still stay in SCS, so Indonesia is quite safe for the next 20 years. And for that period, if we are clever, we need to put more money for R&D and developing our own defense industry (by giving them good amount of order along the period). And after 2040 Indonesia defense industry should be good enough to supply many high tech weapon to Indonesia Armed Force so that we can have large defense spending that is still supportive to our economy.