I got mine put at the end of October. Like you said, Yes heavier periods. the 1st one I got was CRAZY heavy. and yes very annoying. It has decreased for me, but I think that it is different for everyone.
I heard that it is "normal" for periods to be heavier when on Paraguard.
I haven't had any other symptoms, like more PMS or cramping.
Actually I haven't had any cramps with my period since I got it. Well except for the 1st week of course.
It is very annoying, but probably will decrease over time. The way I see it, yes the heavier flow is very annoying. You have to really pay attention to how long you have a pad or tampon in, so you don't overflow. But, at least for me, I'd rather deal with a heavier flow than deal with all the other crazy side effects of hormonal BC.