as you can read in your links, there is significant variability in the extent of the belaching event based on location- geographically north and south; based on currents and ocaean temperatiure and depth of the coral.
If you are DIVING, a decent dive operator will simply chose sites that are deeper and less likely to have been impacted by shallow waters and the heating that can occur in thes areas. Deeper sites, exposed to deeper ocean currents are most likely less impacted.
Flyertalk is probably a poor site for reef advice... are you looking for 'what city should I vist for a base' or is it i'which island?'.
Either of those is where I'd start; then ID opeators and quiz them.