Count me in as one of delusional ones:
http://www.defence.pk/forums/world-affairs/180755-geopolitics-asean-region-10.html
Bangladesh and Sri Lanka both might join ASEAN defense bloc, if it can protect us from big bad India.
ASEAN or ASEAN+ defense bloc does not have to be anti-India or anti-China, but pro ASEAN or ASEAN+. A bloc like this will be good for China and India in the long term as it will reduce the need for an offshore balancer like the US in the region.
ASEAN+ includes Japan and Korea, more details in the link above.
From this, ASEAN as military block is more delusive than ever: you want it to go against India, Viet wants it to go against China. Perhaps Singapore wants it to go against Malaysia... So be it settled among yourselves first.
Back to the topic.
From OP, we can see how much the poster lacks not only history root of ASEAN, but also detaches himself completely from ground reality now. Rather he only bases his judgment/rationalization on his person prejudice.
ASEAN was built for against perceived Vietnamese communist expansion under Soviet intention. Thus Vietnam, China, and Soviet were the enemies.
Though now time is different now, the historical meaning still exist: Vietnam is still a communist country, so in some sense China as perceived by West.
Myopically believe that Vietnam has sea rock dispute with China, to lesser extent the Philippines have as well, meaning that Vietnam can hijack the organization to its own tool is a DELUSION: Laos, Thailand, Cambodia, Singapore, Burma, Malaysia and Indonesia are definitely not on Vietnam's anti-China side.
In fact, if you read the knowledge, any meaningful organization has to be backed up by a power: Warsaw Pack by Soviet, NATO by USA, UN by 5 powers, and earlier or later organizations such as League of Nations, or SCO, none has an exception.
If Vietnam wants to lead something like that? Two words answer: NO WAY!
Vietnam doesn't have unique ideology to provide: it copies politics from Soviet, economy from China, culturally non-distinct.
Vietnam doesn't have monetary means to support: it's poor like a church mouse, reflecting a total failure of its system.
Vietnam doesn't have the military power to backup the organization: just look at its sh!ty navy and uneducated soldiers with rotten arms.
...
Politics, money, military, Vietnam has nothing, zero!
Dude, if you want the people of other more successful AEAN nations to follow your Vietnam into such an abyss, it's a sheer delusion.
Vietnam might go well with the Philippines, .. but can you settle the rock dispute in SCS among yourselves first?