It made it okay for a shows 'plot' to be about 'women' fighting over a teenage guy and showing them naked as much as possible rather than any kind of character plot or actual story to be had. The story could just be established in episode one and the rest of the show could just be tits and ass with a few patches of 'reminder...we also have something KIND OF going on in the background. But the main point is just to see Mahoro in the bath with her master'. In the first season itself, the story of the show doesn't even appear for half the season. In the second season, more random filler and another character is introduced to elongate this hit they had going.
Mahoromatic was where the current Anime formula was introduced. Mix it with Love Hina and take away the (barely there) plot of Mahoromatic and semi good characters from Love Hina and you have the crap Anime we have today.