I mean if you feel like its too fast the ez pz thing to do is to turn the BPM down to like 140 because thats still a breakbeat tempo and if you're trying to do a DnB/Future combo 140 is a suitable BPM for both of those genres... And if thats too fast keep going down until it suits you it doesn't necessarily have to be a cookie cutter BPM for the genre and its not possible to make a song slightly slower paced at a given BPM its pretty much on tempo or half time so turning it down or half time are really the easiest options you have... It sounds good so far though
