I read this while on my phone & it's not that easy to write a reply.....just wanted to let you know that I think what you are doing is very wise.
You are right.....good open communication is definitely needed rather than just going back to the way it was....because you filed for the divorce for a reason & those problems haven't changed.....but when other things take a higher priority like his health....it's wonderful that you do care enough & that you still feel some level of love for that care to be based on......If you feel the need for divorce later on.....it will be available then as it was now so don't worry about it....do what you honestly feel you need to do, the way you need to do it.......glad the divorce wasn't finalized as quickly as you initially hoped it would be......God always has His reasons for everything.
Who knows....maybe by filing for the divorce your H may take it to heart & make some of those serious changes that are necessary to have a good marriage again

Best wishes with this