I have actually been healing with mouseover macros for a while now so that I am not reliant on addons but thats pure choice
But yes, some of my guildies who have used healbot are now having problems. Needless to say so far the only ones who have been healing recently have been the 2 of us that use mouseover healing
#showtooltip
/cast [@mouseover][help,nodead] Healing Wave
Is an example of one from memory that I would use on my shammy.