I CBA to read through 6 pages, but i dont really see the point in making hots tick more often since all its gonna do is force you to recast them more often.
DoTs on the other hand is a different story, you want them to do the most damage possible over a short period of time.
HoTs are already situational, sometimes you want to hot 15 people and other times you only need to put them on 2-5 guys. So making them tick more often means less effective healing over a set amount of time.
Just my 2 cents.