So I was running reg DS today on my Frost DK and I was coming in 2nd in most fights and I was quite pleased as I was doing more than people with better gear than me. Then this guy from a guild we used to have some raids with who I know has a Frost DK whispered me and I found his suggestions rather weird. He told me that 2200 haste is something that Frost should aim for then after that it's okay to drop some. With me being at 2650 haste, he suggested I could benefit from his advice.
He said you should still reforge for haste but it would be okay to drop haste pieces of lower ilvl (378) for stuff thats 397 even though it had no haste on it. His reasoning is that after that your runes come off CD too fast and you will not be able to get rid of that excess RP before you get too many runes back. If you can't get rid of that excess RP, you're missing out on potential runes. During Bloodlust phases I do notice that my RP goes up sky high, especially during points where I am firing 3 oblits in one go.
However, even though it almost made sense in my head, I still didn't want to believe him.
So my question is the same as the title. Is there a such thing as too much haste? I almost wanna call this guy a troll seeing as how I've never heard of this argument in my time of playing frost.